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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"}]}]