DEBIAN-CVE-2026-0865

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-0865
Published: 20 Jan 2026, 22:15
Last modified:15 Jun 2026, 19:06

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
4.0 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Jan 2026, 22:15
Published
Vulnerability first disclosed
15 Jun 2026, 19:06
Last Modified
Vulnerability information updated

Description

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

CVSS Metrics

  • v4.0•MEDIUM•Score: 5.9CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected Systems

  • debian•jython

    all | all | all | all

  • debian•pypy3

    all | all | all | all | < 7.3.21+dfsg-1

  • debian•python2.7

    all

  • debian•python3.11

    all | < 3.11.2-6+deb12u7

  • debian•python3.13

    all | all | < 3.13.5-2+deb13u1 | < 3.13.12-1

  • debian•python3.14

    all | < 3.14.3-1

  • debian•python3.9

    < 3.9.2-1+deb11u5

References (1)