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TI-2026-79214 Aliases CVE-2026-114458GHSA-vh3m-p78w-c5fp

Heap overflow in mod_qos connection monitor enables denial of service

Priority LOW 26CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

The pbuchbinder mod_qos module is affected in versions from 11.74, 11.76 and 11.79. When connection rate monitoring is active, the module does not check array boundaries while recording client IP addresses, so more records can be added than the buffer holds (CWE-787). An unauthenticated remote attacker can exhaust it with many concurrent low-rate connections, corrupting heap memory and crashing the web server process.

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

Description from the CNA

A flaw was found in mod_qos. An unauthenticated remote attacker can cause a Denial of Service (DoS) by maintaining numerous concurrent low-rate connections to a target server. When connection rate monitoring is active, the module fails to verify array boundaries when recording client IP addresses, allowing more connection records to be added than the allocated buffer can hold. This issue leads to heap memory corruption, which can crash the web server process.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0031 24th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
pbuchbindermod_qos11.74; 11.76; 11.79—No fix listedCNA
  • mod_qos Vendorpbuchbinder Affected 11.74; 11.76; 11.79 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for mod_qos.

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

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-114458
  2. 2026-10-22 Alias added: GHSA-vh3m-p78w-c5fp
  3. 2026-10-22 Affected versions changed · Red Hat
  4. 2026-10-22 CVSS score added · Red Hat
  5. 2026-10-23 Priority changed: MEDIUM → LOW
  6. 2026-10-26 CISA SSVC decision points changed

References

Other 2

  • TI-2026-79216 Query truncation in mod_qos lets attackers bypass security rules CVSS 3.1MEDIUM 5.3
  • TI-2026-79215 Mod_qos: out-of-bounds reads in response-body substring matching CVSS 3.1LOW 3.7
  • TI-2026-79213 Missing string termination in mod_qos JSON escaping crashes Apache CVSS 3.1LOW 3.7

Sources

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