CVE-2026-0865
EPSS 0.17%wsgiref.headers.Headers allows header newline injection
Published: 1/20/2026Modified: 5/16/2026
Description
User-controlled header names and values containing newlines can allow injecting HTTP headers.
Affected packages (10)
- Bitnami/libpythonfrom 0, < 3.10.20, >= 3.11.0, < 3.11.15, >= 3.12.0, < 3.12.13, >= 3.13.0, < 3.13.12, >= 3.14.0, < 3.14.3
- Bitnami/pythonfrom 0, < 3.10.20, >= 3.11.0, < 3.11.15, >= 3.12.0, < 3.12.13, >= 3.13.0, < 3.13.12, >= 3.14.0, < 3.14.3
- Bitnami/python-minfrom 0, < 3.10.20, >= 3.11.0, < 3.11.15, >= 3.12.0, < 3.12.13, >= 3.13.0, < 3.13.12, >= 3.14.0, < 3.14.3
- Debian/jythonfrom 0
- Debian/pypy3from 0
- Debian/python2.7from 0
- Debian/python3.11from 0, < 3.11.2-6+deb12u7
- Debian/python3.13from 0, < 3.13.5-2+deb13u1
- Debian/python3.14from 0, < 3.14.3-1
- Debian/python3.9from 0, < 3.9.2-1+deb11u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS: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 |
References (17)
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-0865
- WEBhttps://github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee58
- WEBhttps://github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c510
- WEBhttps://github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5f
- WEBhttps://github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d2
- WEBhttps://github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c5
- WEBhttps://github.com/python/cpython/commit/66da7bf6fe7b81e3ecc9c0a25bd47d4616c8d1a6
- WEBhttps://github.com/python/cpython/commit/83ecd18779f286d872f68bfce175651e407d9fff
- WEBhttps://github.com/python/cpython/commit/8bb044d29310bb05d15086cdaa8bf64867d61a97
- WEBhttps://github.com/python/cpython/commit/bfba660085767f8c2d582134e9d511a85eda04cf
- WEBhttps://github.com/python/cpython/commit/c592227ffb48679af9845a45dbb0875d975bb219
- WEBhttps://github.com/python/cpython/commit/e4846a93ac07a8ae9aa18203af0dd13d6e7a6995
- WEBhttps://github.com/python/cpython/commit/f7fceed79ca1bceae8dbe5ba5bc8928564da7211
- WEBhttps://github.com/python/cpython/issues/143916
- WEBhttps://github.com/python/cpython/pull/143917
- WEBhttps://mail.python.org/archives/list/[email protected]/thread/BJ6QPHNSHJTS3A7CFV6IBMCAP2DWRVNT/
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2026-0865