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TI-2026-36100 Aliases CVE-2026-48834GHSA-9mxc-x85j-v2wc

Apache Answer: Denial of service via crafted Accept-Language header parsing

Priority MEDIUM 40CWE-400Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-400.

Summary

Improper Handling of Length Parameter Inconsistency vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. Unauthenticated attackers can cause a denial of service via a specially crafted Accept-Language header that triggers excessive CPU consumption during parsing. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00764 55th 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
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
ApacheApache Answerup to 2.0.1—No fix listedCNA
  • Apache Answer VendorApache Affected up to 2.0.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:answer:*:*:*:*:*:*:*:*before 2.0.2VulnerableApache
  • cpe:2.3:a:apache:answer:*:*:*:*:*:*:*:* Versions before 2.0.2 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48834
  2. 2026-10-03 Alias added: GHSA-9mxc-x85j-v2wc

References

Advisory 2

  • TI-2024-14967 Apache Answer: Pixel Flood Attack by uploading the large pixel file CVSS 3.1CRITICAL 9.1
  • TI-2026-42802 Apache Answer: Residual Administrative API Key Access After Role or Account Revocation CVSS 3.1CRITICAL 9.1
  • TI-2026-42790 Apache Answer: Unauthorized disclosure of deleted or pending answer content CVSS 3.1HIGH 7.5
  • TI-2026-36171 Apache Answer: Unauthenticated OAuth Email-Binding Account Takeover via Existing User Confirmation Flow CVSS 3.1HIGH 7.5
  • TI-2026-19940 Apache Answer: Revision API Improper Access Control leads to Information Disclosure CVSS 3.1HIGH 7.5
  • TI-2026-26357 Apache Answer: The custom avatar was not properly validated CVSS 3.1MEDIUM 6.5
See all 23 →

Sources

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