BlackTreeCVE Intelligence
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Full vulnerability report · 2023
CVE-2023-26112High confidence

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)\((.*)\)

Unknown · configobj

3.7LowCVSS 3.1
Recommended action
Within 7 days

Low technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityLowOperational priority:Medium, raised one band.upgradedsince 13 Feb 2025

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 1.27% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown configobj and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  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 findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

4 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 · sourceconfigobjVendor fix publishedDebian records a fixed source-package version for this release.5.0.8-2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourceconfigobjAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourceconfigobjVendor fix publishedDebian records a fixed source-package version for this release.5.0.8-2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourceconfigobjVendor fix publishedDebian records a fixed source-package version for this release.5.0.8-2Debian Security Tracker ↗Source updated 5 Oct 2026
Open-source package ranges1 source-attributed range

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
pipconfigobj< 5.0.95.0.9GitHub advisory ↗github reviewed aggregator · 16 Dec 2024
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-2023-1260

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 actionWithin 7 days

Low technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)\((.*)\). **Note:** This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

What

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)\((.*)\). **Note:** This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Why

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)\((.*)\). **Note:** This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Why

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Inefficient Regular Expression Complexity → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-1333 ↗

CWE-1333: Inefficient Regular Expression Complexity. The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.ALowAvailability impact: A successful attack can cause a limited loss.
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.
NetworkUnauthenticatedDenial of serviceCWE-1333Public exploit reference
A

Official authority intelligence

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

Cyber Security Agency of Singapore · English · CSA-SB-20230405Security Bulletin 05 Apr 2023

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 05 Apr 2023, published on 5 April 2023. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1165Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2022-48773 Référence CVE CVE-2022-48804 https://www.cve.org/CVERecord?id=CVE-2022-48804 Référence CVE CVE-2022-48836 https://www.cve.org/CVERecord?id=CVE-2022-48836 Référence CVE CVE-2022-48866 https://www.cve.org/CVERecord?id=CVE-2022-48866 Référence CVE CVE-2023-1370 https://www.cve.org/CVERecord?id=CVE-2023-1370 Référence CVE CVE-2023-22946 https://www.cve.org/CVERecord?id=CVE-2023-22946 Référence CVE CVE-2023-24998 https://www.cve.org/CVERecord?id=CVE-2023-24998 Référence CVE CVE-2023-26048 https://www.cve.org/CVERecord?id=CVE-2023-26048 Référence CVE CVE-2023-26049 https://www.cve.org/CVERecord?id=CVE-2023-26049 Référence CVE CVE-2023-26112 https://www.cve.org/CVERecord?id=CVE-2023-26112 Référence CVE CVE-2023-28370 https://www.cve.org/CVERecord?id=CVE-2023-28370 Référence CVE CVE-2023-28746 https://www.cve.org/CVERecord?id=CVE-2023-28746 Référence CVE CVE-2023-29267 https://www.cve.org/CVERecord?id=CVE-2023-29267 Référence CVE CVE-2023-2976 https://www.cve.org/CVERecord?id=CVE-2023-2976 Référence CVE CVE-2023-33201 https://www.cve.org/CVERecord?id=CVE-2023-33201 Référence CVE CVE-2023-34453 https://www.cve.org/CVERecord?id=CVE-2023-34453 Référence CVE CVE-2023-34454 https://www.cve.org/CVERecord?id=CVE-2023-34454 Référence CVE CVE-2023-34455 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0326Multiples vulnérabilités dans les produits VMware

.org/CVERecord?id=CVE-2023-0464 Référence CVE CVE-2023-0465 https://www.cve.org/CVERecord?id=CVE-2023-0465 Référence CVE CVE-2023-0466 https://www.cve.org/CVERecord?id=CVE-2023-0466 Référence CVE CVE-2023-1193 https://www.cve.org/CVERecord?id=CVE-2023-1193 Référence CVE CVE-2023-1255 https://www.cve.org/CVERecord?id=CVE-2023-1255 Référence CVE CVE-2023-1386 https://www.cve.org/CVERecord?id=CVE-2023-1386 Référence CVE CVE-2023-2007 https://www.cve.org/CVERecord?id=CVE-2023-2007 Référence CVE CVE-2023-23931 https://www.cve.org/CVERecord?id=CVE-2023-23931 Référence CVE CVE-2023-25951 https://www.cve.org/CVERecord?id=CVE-2023-25951 Référence CVE CVE-2023-26112 https://www.cve.org/CVERecord?id=CVE-2023-26112 Référence CVE CVE-2023-26242 https://www.cve.org/CVERecord?id=CVE-2023-26242 Référence CVE CVE-2023-26551 https://www.cve.org/CVERecord?id=CVE-2023-26551 Référence CVE CVE-2023-26552 https://www.cve.org/CVERecord?id=CVE-2023-26552 Référence CVE CVE-2023-26553 https://www.cve.org/CVERecord?id=CVE-2023-26553 Référence CVE CVE-2023-26554 https://www.cve.org/CVERecord?id=CVE-2023-26554 Référence CVE CVE-2023-26555 https://www.cve.org/CVERecord?id=CVE-2023-26555 Référence CVE CVE-2023-26586 https://www.cve.org/CVERecord?id=CVE-2023-26586 Référence CVE CVE-2023-2828 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0316Multiples vulnérabilités dans les produits VMware

.org/CVERecord?id=CVE-2023-0464 Référence CVE CVE-2023-0465 https://www.cve.org/CVERecord?id=CVE-2023-0465 Référence CVE CVE-2023-0466 https://www.cve.org/CVERecord?id=CVE-2023-0466 Référence CVE CVE-2023-1193 https://www.cve.org/CVERecord?id=CVE-2023-1193 Référence CVE CVE-2023-1255 https://www.cve.org/CVERecord?id=CVE-2023-1255 Référence CVE CVE-2023-1386 https://www.cve.org/CVERecord?id=CVE-2023-1386 Référence CVE CVE-2023-2007 https://www.cve.org/CVERecord?id=CVE-2023-2007 Référence CVE CVE-2023-23931 https://www.cve.org/CVERecord?id=CVE-2023-23931 Référence CVE CVE-2023-25951 https://www.cve.org/CVERecord?id=CVE-2023-25951 Référence CVE CVE-2023-26112 https://www.cve.org/CVERecord?id=CVE-2023-26112 Référence CVE CVE-2023-26242 https://www.cve.org/CVERecord?id=CVE-2023-26242 Référence CVE CVE-2023-26551 https://www.cve.org/CVERecord?id=CVE-2023-26551 Référence CVE CVE-2023-26552 https://www.cve.org/CVERecord?id=CVE-2023-26552 Référence CVE CVE-2023-26553 https://www.cve.org/CVERecord?id=CVE-2023-26553 Référence CVE CVE-2023-26554 https://www.cve.org/CVERecord?id=CVE-2023-26554 Référence CVE CVE-2023-26555 https://www.cve.org/CVERecord?id=CVE-2023-26555 Référence CVE CVE-2023-26586 https://www.cve.org/CVERecord?id=CVE-2023-26586 Référence CVE CVE-2023-2828 https://www.cve.org/CVERecord?id=C

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-006524configobj project の configobj における非効率的な正規表現の複雑さに関する脆弱性

configobj project の configobj には、非効率的な正規表現の複雑さ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.
Fix not verified
Affected
configobj: < *
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
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 3 Apr 2023 · Last source change 13 Feb 2025, 19:35 UTC · CWE-1333 · Inefficient Regular Expression Complexity

CVE recordCVE.org · 5.1
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-2023-1260
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2023-1260↗CISA Vulnrichment SSVC evidence↗Public exploit 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-2023-26112 · cve.blacktree.nl