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DEBIAN-CVE-2026-0865

User-controlled header names and values containing newlines can allow injecting HTTP headers.

AI summary snake-internal / snake-template-v1

A weakness called DEBIAN-CVE-2026-0865 was discovered in User-controlled header names. Severity is Info. Low severity or not yet rated. What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "User-controlled header names DEBIAN-CVE-2026-0865".
DEBIAN-CVE-2026-0865 (User-controlled header names). Severity: Info. Response plan: 1. Check the vendor advisory for affected versions and the patched release. 2. If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS). 3. If no patch yet, mitigate via WAF rule, disabling the affected feature, etc. 4. Monitor logs / SIEM for known IOC and PoC signatures of this CVE. PoCs and fix commits: see the 'References' section, MITRE, and NVD.
❓ What is the problem
A weakness (DEBIAN-CVE-2026-0865) in User-controlled header names. A serious software flaw has been identified.
📍 Affected scope
Target versions of User-controlled header names (see vendor advisory). If running in production, identify exposure immediately.
🔥 Severity
Severity: Info. Low severity or not yet rated.
🔧 How to fix
Update to the patched release as listed in the vendor advisory.
🛡️ Workaround
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
🔍 Detection
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.

Affected packages

Debian:11 jython
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12 jython
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13 jython
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14 jython
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:11 pypy3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12 pypy3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13 pypy3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14 pypy3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.3.21+dfsg-1"}]}]
Debian:11 python2.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12 python3.11
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11.2-6+deb12u7"}]}]
Debian:13 python3.13
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.5-2+deb13u1"}]}]
Debian:14 python3.13
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.12-1"}]}]
Debian:14 python3.14
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.3-1"}]}]
Debian:11 python3.9
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.2-1+deb11u5"}]}]

References

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