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Full vulnerability report · 2024
CVE-2024-52304High confidence

aiohttp vulnerable to request smuggling due to incorrect parsing of chunk extensions

aio-libs · aiohttp

Official source article: GitHub GHSA-8495-4G3G-X7PR ↗. Check the applicable product and release in the original source.

6.3MediumCVSS 4.0
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 0.56% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs aio-libs aiohttp and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcepython-aiohttpVendor fix publishedDebian records a fixed source-package version for this release.3.10.11-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcepython-aiohttpVendor fix publishedDebian records a fixed source-package version for this release.3.8.4-1+deb12u1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcepython-aiohttpVendor fix publishedDebian records a fixed source-package version for this release.3.10.11-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcepython-aiohttpVendor fix publishedDebian records a fixed source-package version for this release.3.10.11-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · esm-appspython-aiohttpVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.3.9.1-1ubuntu0.1+esm1Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Open-source package ranges2 source-attributed ranges

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
PyPIaiohttpECOSYSTEM: introduced 0; fixed 3.10.113.10.11OSV record ↗aggregator derived · 10 Sep 2026
pipaiohttp<= 3.10.103.10.11GitHub advisory ↗upstream repository advisory · 3 Nov 2025
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2024-52304 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityaiohttp: aiohttp vulnerable to request smuggling due to incorrect parsing of chunk extensions
7 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • openshift-lightspeed-tech-preview/lightspeed-service-api-rhel9.src as a component of OpenShift Lightspeed
  • rhelai1/bootc-amd-rhel9.src as a component of Red Hat Enterprise Linux AI (RHEL AI)
  • rhelai1/bootc-azure-nvidia-rhel9.src as a component of Red Hat Enterprise Linux AI (RHEL AI)
  • rhelai1/bootc-nvidia-rhel9.src as a component of Red Hat Enterprise Linux AI (RHEL AI)
  • rhelai1/instructlab-amd-rhel9.src as a component of Red Hat Enterprise Linux AI (RHEL AI)
  • rhelai1/instructlab-nvidia-rhel9.src as a component of Red Hat Enterprise Linux AI (RHEL AI)
  • python-aiohttp.src as a component of Red Hat Update Infrastructure 4 for Cloud Providers
Summary
A flaw was found in the aiohttp package. The Python parser parses newlines in chunk extensions incorrectly, which can lead to request smuggling vulnerabilities under certain conditions. If a pure Python version of aiohttp is installed, for example, without the usual C extensions, or `AIOHTTP_NO_EXTENSIONS` is enabled, an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections.
Remediation
Red Hat Ansible Automation Platform
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2024-3218

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.10.11, the Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or `AIOHTTP_NO_EXTENSIONS` is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.10.11 fixes the issue.

What

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.10.11, the Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or `AIOHTTP_NO_EXTENSIONS` is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.10.11 fixes the issue.

Why

The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.10.11, the Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or `AIOHTTP_NO_EXTENSIONS` is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.10.11 fixes the issue.

Why

The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-444 ↗

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'). The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATPresentAttack requirements: A particular deployment or execution condition must be present.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VILowVulnerable-system integrity: A successful attack can cause a limited loss.VANoneVulnerable-system availability: No direct loss is represented by this metric.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-444
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-3584Red Hat Ansible Automation Platform: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Ansible Automation Platform ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20241120Security Bulletin 20 Nov 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 20 Nov 2024, published on 20 November 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0627Multiples vulnérabilités dans les produits Splunk

ord?id=CVE-2024-37891 Référence CVE CVE-2024-39689 https://www.cve.org/CVERecord?id=CVE-2024-39689 Référence CVE CVE-2024-4068 https://www.cve.org/CVERecord?id=CVE-2024-4068 Référence CVE CVE-2024-41110 https://www.cve.org/CVERecord?id=CVE-2024-41110 Référence CVE CVE-2024-41996 https://www.cve.org/CVERecord?id=CVE-2024-41996 Référence CVE CVE-2024-45337 https://www.cve.org/CVERecord?id=CVE-2024-45337 Référence CVE CVE-2024-45339 https://www.cve.org/CVERecord?id=CVE-2024-45339 Référence CVE CVE-2024-47081 https://www.cve.org/CVERecord?id=CVE-2024-47081 Référence CVE CVE-2024-47561 https://www.cve.org/CVERecord?id=CVE-2024-47561 Référence CVE CVE-2024-52304 https://www.cve.org/CVERecord?id=CVE-2024-52304 Référence CVE CVE-2024-5321 https://www.cve.org/CVERecord?id=CVE-2024-5321 Référence CVE CVE-2024-53899 https://www.cve.org/CVERecord?id=CVE-2024-53899 Référence CVE CVE-2024-5535 https://www.cve.org/CVERecord?id=CVE-2024-5535 Référence CVE CVE-2024-55549 https://www.cve.org/CVERecord?id=CVE-2024-55549 Référence CVE CVE-2024-58251 https://www.cve.org/CVERecord?id=CVE-2024-58251 Référence CVE CVE-2024-6345 https://www.cve.org/CVERecord?id=CVE-2024-6345 Référence CVE CVE-2024-7264 https://www.cve.org/CVERecord?id=CVE-2024-7264 Référence CVE CVE-2024-7592 https://www.cve.org/CVERecord?id=CVE-2024-

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0538Multiples vulnérabilités dans VMware Tanzu

cord?id=CVE-2024-3651 Référence CVE CVE-2024-37891 https://www.cve.org/CVERecord?id=CVE-2024-37891 Référence CVE CVE-2024-39689 https://www.cve.org/CVERecord?id=CVE-2024-39689 Référence CVE CVE-2024-39705 https://www.cve.org/CVERecord?id=CVE-2024-39705 Référence CVE CVE-2024-42367 https://www.cve.org/CVERecord?id=CVE-2024-42367 Référence CVE CVE-2024-43497 https://www.cve.org/CVERecord?id=CVE-2024-43497 Référence CVE CVE-2024-45337 https://www.cve.org/CVERecord?id=CVE-2024-45337 Référence CVE CVE-2024-51744 https://www.cve.org/CVERecord?id=CVE-2024-51744 Référence CVE CVE-2024-5206 https://www.cve.org/CVERecord?id=CVE-2024-5206 Référence CVE CVE-2024-52304 https://www.cve.org/CVERecord?id=CVE-2024-52304 Référence CVE CVE-2024-53899 https://www.cve.org/CVERecord?id=CVE-2024-53899 Référence CVE CVE-2024-5569 https://www.cve.org/CVERecord?id=CVE-2024-5569 Référence CVE CVE-2024-56201 https://www.cve.org/CVERecord?id=CVE-2024-56201 Référence CVE CVE-2024-56326 https://www.cve.org/CVERecord?id=CVE-2024-56326 Référence CVE CVE-2024-5998 https://www.cve.org/CVERecord?id=CVE-2024-5998 Référence CVE CVE-2024-7804 https://www.cve.org/CVERecord?id=CVE-2024-7804 Référence CVE CVE-2024-8309 https://www.cve.org/CVERecord?id=CVE-2024-8309 Référence CVE CVE-2025-1094 https://www.cve.org/CVERecord?id=CVE-2025-

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0481Multiples vulnérabilités dans les produits IBM

d?id=CVE-2024-38819 Référence CVE CVE-2024-38827 https://www.cve.org/CVERecord?id=CVE-2024-38827 Référence CVE CVE-2024-38828 https://www.cve.org/CVERecord?id=CVE-2024-38828 Référence CVE CVE-2024-43800 https://www.cve.org/CVERecord?id=CVE-2024-43800 Référence CVE CVE-2024-45337 https://www.cve.org/CVERecord?id=CVE-2024-45337 Référence CVE CVE-2024-47764 https://www.cve.org/CVERecord?id=CVE-2024-47764 Référence CVE CVE-2024-49766 https://www.cve.org/CVERecord?id=CVE-2024-49766 Référence CVE CVE-2024-49767 https://www.cve.org/CVERecord?id=CVE-2024-49767 Référence CVE CVE-2024-50379 https://www.cve.org/CVERecord?id=CVE-2024-50379 Référence CVE CVE-2024-52304 https://www.cve.org/CVERecord?id=CVE-2024-52304 Référence CVE CVE-2024-52316 https://www.cve.org/CVERecord?id=CVE-2024-52316 Référence CVE CVE-2024-52317 https://www.cve.org/CVERecord?id=CVE-2024-52317 Référence CVE CVE-2024-56171 https://www.cve.org/CVERecord?id=CVE-2024-56171 Référence CVE CVE-2024-56201 https://www.cve.org/CVERecord?id=CVE-2024-56201 Référence CVE CVE-2024-56326 https://www.cve.org/CVERecord?id=CVE-2024-56326 Référence CVE CVE-2024-56332 https://www.cve.org/CVERecord?id=CVE-2024-56332 Référence CVE CVE-2024-56337 https://www.cve.org/CVERecord?id=CVE-2024-56337 Référence CVE CVE-2024-57556 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-027190aiohttp project の aiohttp における HTTP リクエストスマグリングに関する脆弱性

aiohttp project の aiohttp には、HTTP リクエストスマグリングに関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
Red Hat Ansible Automation Platform
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 18 Nov 2024 · Last source change 3 Nov 2025, 20:45 UTC · CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2024-3218
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    < 3.10.11 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    < 3.10.11 · Fixed: Red Hat Ansible Automation Platform
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2024-3218↗Red Hat Product Security security advisory↗CVE authority or vendor reference · GitHub GHSA-8495-4G3G-X7PR↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2024-52304 · cve.blacktree.nl