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TI-2026-78708 Aliases CVE-2026-114095

Infinite recursion in Dulwich pack parsing causes denial of service

Priority LOW 37CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 5 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-835.

Summary

Dulwich before 1.2.9 contains an infinite loop in Pack.resolve_object, which recurses forever on self-referential OFS_DELTA objects (CWE-835). A remote attacker can supply a malicious packfile that exhausts CPU during clone, fetch, or cat-file operations, and user interaction is required.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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 it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00311 24th percentileScored 2026-11-07
Fix Partial dulwich (jelmer): 1.2.9Red Hat: 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
jelmerdulwichbefore 1.2.91.2.9Patch availableCNA
  • dulwich Vendorjelmer Affected before 1.2.9 Fixed in 1.2.9 Patch available CNA

Remediation

Upgrade Dulwich to version 1.2.9, which fixes the flaw. Red Hat's plan is none available for Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift AI (RHOAI) and Red Hat OpenShift Container Platform 4.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA dulwich (jelmer) Fixed in 1.2.9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    jelmer dulwich 1.2.9

    2 records Highest priority Priority HIGH 1 HIGH, 1 LOW

    Other records, highest priority first

    • TI-2026-78707 Path traversal in Dulwich lets attackers write files on WindowsPriority HIGH 73
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Not affected: 2 products
  • Red Hat Ansible Automation Platform 2
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-114095
  2. 2026-10-21 CISA SSVC decision points changed
  3. 2026-10-21 Priority changed: MEDIUM → LOW
  4. 2026-10-22 Affected versions changed · Red Hat
  5. 2026-10-22 CVSS score added · Red Hat

References

Advisory 1

  • TI-2026-78707 Path traversal in Dulwich lets attackers write files on Windows CVSS 4.0HIGH 8.7
  • TI-2026-37846 Path traversal in jelmer dulwich CVSS 3.1HIGH 7.5
  • TI-2026-30843 Dulwich Vulnerable to Command Injection via Merge Driver Path CVSS 4.0HIGH 7.7
  • TI-2026-78709 Symlink following in Dulwich checkout allows arbitrary file writes CVSS 4.0HIGH 7.3
  • TI-2026-30613 Dulwich has an arbitrary file write via NTFS-hostile tree entries on Windows CVSS 3.1HIGH 8.8
  • TI-2026-85266 Dulwich commit parser picks the wrong tree from duplicate headers CVSS 4.0HIGH 8.6
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences