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TI-2026-76582 Aliases CVE-2026-112300GHSA-w53r-mv8r-wgxx

DiffSK configobj _sectionmarker ReDoS in configobj/__init__.py

Priority LOW 37CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Deferred Red Hat: fix deferred

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-1333.

Summary

DiffSK configobj versions 5.0.0 through 5.0.9 contain an inefficient regular expression complexity flaw (CWE-1333, with CWE-400) in the _sectionmarker function of configobj/__init__.py. Remote attackers can trigger it without privileges or user interaction, causing resource consumption that impacts availability. CISA SSVC marks the issue as automatable with partial technical impact and no known exploitation, and the CVSS 4.0 base score is 6.9 (MEDIUM). The project was informed through an issue report but has not responded, and no fix is listed; Red Hat rates it Moderate and reports no available fix for Red Hat Enterprise Linux 8, 9 or 10.

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

Description from the CNA

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00534 45th percentileScored 2026-11-07
Fix Deferred Red Hat: fix deferred

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
DiffSKconfigobj5.0.0; 5.0.1; 5.0.2; 5.0.3; 5.0.4; 5.0.5; 5.0.6; 5.0.7; 5.0.8; 5.0.9—No fix listedCNA
  • configobj VendorDiffSK Affected 5.0.0; 5.0.1; 5.0.2; 5.0.3; 5.0.4; 5.0.5; 5.0.6; 5.0.7; 5.0.8; 5.0.9 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:diffsk:configobj:*:*:*:*:*:*:*:*——DiffSK
  • cpe:2.3:a:diffsk:configobj:*:*:*:*:*:*:*:* Versions — — ·DiffSK

Remediation

The sources list no fixed version for configobj. Restrict untrusted input reaching the _sectionmarker function, or replace configobj with another parser until the project publishes a fix. Track the upstream project and Red Hat for updates.

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

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-112300
  2. 2026-10-20 Alias added: GHSA-w53r-mv8r-wgxx
  3. 2026-10-20 Affected versions changed · Red Hat
  4. 2026-10-20 CVSS score added · Red Hat
  5. 2026-10-20 CISA SSVC decision points changed
  6. 2026-10-20 Priority changed: MEDIUM → LOW

References

Other 2

Sources

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