Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.25% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-114095High confidence
Dulwich before 1.2.9 Infinite Loop DoS via Pack.resolve_object
jelmer · dulwich
Official source article: GitHub GHSA-35MR-4567-66VG ↗. Check the applicable product and release in the original source.
7.1HighCVSS 4.0
Patch only the product branches with a verified fix
Fix availability varies by productHigh technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 32 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
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
- Confirm that the asset runs jelmer dulwich and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 32 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
- Red Hat Product Security: 18 affected or under-investigation product states without a fixed product state in the same current advisory
- SUSE Product Security Team: 12 affected or under-investigation product states without a fixed product state in the same current advisory
- Debian Security Tracker: 2 affected package states with no published fix
Distribution package intelligence
5 package statesRelease-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.
Package result overrides the generic status
BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 2 affected package states shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.
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 release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Debian trixietrixie · source | dulwich | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian bookwormbookworm · source | dulwich | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian forkyforky · source | dulwich | Vendor fix publishedDebian records a fixed source-package version for this release. | 1.2.11-1 | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian sidsid · source | dulwich | Vendor fix publishedDebian records a fixed source-package version for this release. | 1.2.11-1 | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Ubuntu 24.04 LTSnoble · standard archive | dulwich | Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing. | Not published in this feed | Canonical Ubuntu Security ↗Source updated 23 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 package | Affected range | First fixed version | Evidence |
|---|---|---|---|
| PyPIdulwich | ECOSYSTEM: introduced 0; fixed 1.2.9 | 1.2.9 | OSV record ↗aggregator derived · 21 Oct 2026 |
Direct vendor intelligence
2 currentAuthoritative 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.
CVE-2026-114095 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitydulwich: dulwich: Denial of Service via self-referential packfile delta objects
The vendor explicitly identifies these products as affected by this CVE.
- ansible-automation-platform-26/controller-rhel9 as a component of Red Hat Ansible Automation Platform 2
- ansible-automation-platform-26/lightspeed-chatbot-rhel9 as a component of Red Hat Ansible Automation Platform 2
- ansible-automation-platform-27/controller-rhel9 as a component of Red Hat Ansible Automation Platform 2
- resource-agents as a component of Red Hat Enterprise Linux 7
- resource-agents-aliyun as a component of Red Hat Enterprise Linux 7
- resource-agents-gcp as a component of Red Hat Enterprise Linux 7
- resource-agents-sap as a component of Red Hat Enterprise Linux 7
- resource-agents-sap-hana as a component of Red Hat Enterprise Linux 7
- resource-agents-sap-hana-scaleout as a component of Red Hat Enterprise Linux 7
- resource-agents.src as a component of Red Hat Enterprise Linux 7
- sap-cluster-connector as a component of Red Hat Enterprise Linux 7
- resource-agents as a component of Red Hat Enterprise Linux 8
- Summary
- A flaw was found in dulwich. When resolving Git packfile objects, the delta offset calculation fails to properly validate self-referential entries. An attacker can exploit this issue by providing a specially crafted Git packfile during repository operations such as clone or fetch, triggering infinite recursion. This leads to excessive CPU consumption, causing the application to hang or crash and resulting in a Denial of Service (DoS).
- Remediation
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVE-2026-114095 · CSAF 2.0 · revision 2 · interimSUSE Product Security TeamCVE-2026-114095
The vendor explicitly identifies these products as affected by this CVE.
- python-dulwich as component of SUSE Linux Enterprise High Performance Computing 12
- python-dulwich as component of SUSE Linux Enterprise Module for Public Cloud 12
- python-dulwich as component of SUSE Linux Enterprise Server 12 SP3
- python-dulwich as component of SUSE Linux Enterprise Server 12 SP4
- python-dulwich as component of SUSE Linux Enterprise Server 12 SP5-LTSS
- python-dulwich as component of SUSE Linux Enterprise Server 12 SP5
- python-dulwich as component of SUSE Linux Enterprise Server 12
- python-dulwich as component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
- python-dulwich as component of SUSE Linux Enterprise Server for SAP Applications 12 SP3
- python-dulwich as component of SUSE Linux Enterprise Server for SAP Applications 12 SP4
- python-dulwich as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5
- python-dulwich as component of SUSE Linux Enterprise Server for SAP Applications 12
- Summary
- Dulwich before 1.2.9 contains a denial of service vulnerability in Pack.resolve_object that allows attackers to cause infinite recursion via self-referential OFS_DELTA objects. Attackers can supply a malicious packfile with an OFS_DELTA delta_offset of 0 to exhaust CPU during clone, fetch, or cat-file operations.
- Remediation
- No remediation text is recorded.
High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 32 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Fix availability varies by product01
What, why and how
Dulwich before 1.2.9 contains a denial of service vulnerability in Pack.resolve_object that allows attackers to cause infinite recursion via self-referential OFS_DELTA objects. Attackers can supply a malicious packfile with an OFS_DELTA delta_offset of 0 to exhaust CPU during clone, fetch, or cat-file operations.
What
Dulwich before 1.2.9 contains a denial of service vulnerability in Pack.resolve_object that allows attackers to cause infinite recursion via self-referential OFS_DELTA objects. Attackers can supply a malicious packfile with an OFS_DELTA delta_offset of 0 to exhaust CPU during clone, fetch, or cat-file operations.
Why
A malformed condition prevents a loop from making progress or terminating, allowing resource exhaustion.
How
An attacker operating through a network path may attempt exploitation when the stated preconditions are met. If successful, the issue may disrupt the affected service.
What
Dulwich before 1.2.9 contains a denial of service vulnerability in Pack.resolve_object that allows attackers to cause infinite recursion via self-referential OFS_DELTA objects. Attackers can supply a malicious packfile with an OFS_DELTA delta_offset of 0 to exhaust CPU during clone, fetch, or cat-file operations.
Why
A malformed condition prevents a loop from making progress or terminating, allowing resource exhaustion.
How
An attacker operating through a network path may attempt exploitation when the stated preconditions are met. 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 No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 → Loop with Unreachable Exit Condition ('Infinite Loop') → disrupt the affected service
- Attack surface
- Network
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- Passive interaction required
- 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-835 ↗
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'). The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
- 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:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NCommon 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.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIPassiveUser interaction: A user must unknowingly interact with the vulnerable system.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VAHighVulnerable-system availability: A successful attack can cause a major loss.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.
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 availability varies by product
- Affected
- ansible-automation-platform-26/controller-rhel9 as a component of Red Hat Ansible Automation Platform 2
- ansible-automation-platform-26/lightspeed-chatbot-rhel9 as a component of Red Hat Ansible Automation Platform 2
- ansible-automation-platform-27/controller-rhel9 as a component of Red Hat Ansible Automation Platform 2
- resource-agents as a component of Red Hat Enterprise Linux 7
- resource-agents-aliyun as a component of Red Hat Enterprise Linux 7
- resource-agents-gcp as a component of Red Hat Enterprise Linux 7
- resource-agents-sap as a component of Red Hat Enterprise Linux 7
- resource-agents-sap-hana as a component of Red Hat Enterprise Linux 7
- resource-agents-sap-hana-scaleout as a component of Red Hat Enterprise Linux 7
- resource-agents.src as a component of Red Hat Enterprise Linux 7
- sap-cluster-connector as a component of Red Hat Enterprise Linux 7
- resource-agents as a component of Red Hat Enterprise Linux 8
- resource-agents-aliyun as a component of Red Hat Enterprise Linux 8
- resource-agents-gcp as a component of Red Hat Enterprise Linux 8
- resource-agents-paf as a component of Red Hat Enterprise Linux 8
- resource-agents.src as a component of Red Hat Enterprise Linux 8
- rhoai/odh-kserve-autogluon-server-rhel9 as a component of Red Hat OpenShift AI (RHOAI)
- python-dulwich.src as a component of Red Hat OpenShift Container Platform 4
- Fixed
- dulwich: 1.2.9
- Action
- Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
- Workaround
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
04
Evidence and provenance
Published 21 Oct 2026 · Last source change 21 Oct 2026, 15:49 UTC · CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-10-21
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-106898
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- ENISA EUVD mappingEUVD-2026-106898 was added to the official ENISA EUVD mapping for this CVE.ENISA EUVD ↗
- Before
- not recorded
- After
- {"euvdId":"EUVD-2026-106898"}
- Vendor guidanceAuthoritative vendor guidance changed: removed vendor advisory: github.com/GHSA-35mr-4567-66vg.CNA ↗
- Before
- remediation: github.com/GHSA-35mr-4567-66vg · vendor advisory: github.com/GHSA-35mr-4567-66vg
- After
- remediation: github.com/GHSA-35mr-4567-66vg
- Catalogue recordCVE added to the BlackTree catalogue.CNA ↗
CVE published
Fixed release or patch reference recorded
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.