CVE-2026-0672
EPSS 0.21%Header injection in http.cookies.Morsel
Published: 1/20/2026Modified: 5/16/2026
Description
When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.
Affected packages (8)
- 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/pypy3from 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+deb11u7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/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 (11)
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-0672
- WEBhttps://github.com/python/cpython/commit/62700107418eb2cca3fc88da036a243ea975f172
- WEBhttps://github.com/python/cpython/commit/712452e6f1d4b9f7f8c4c92ebfcaac1705faa440
- WEBhttps://github.com/python/cpython/commit/7852d72b653fea0199acf5fc2a84f6f8b84eba8d
- WEBhttps://github.com/python/cpython/commit/918387e4912d12ffc166c8f2a38df92b6ec756ca
- WEBhttps://github.com/python/cpython/commit/95746b3a13a985787ef53b977129041971ed7f70
- WEBhttps://github.com/python/cpython/commit/b1869ff648bbee0717221d09e6deff46617f3e85
- WEBhttps://github.com/python/cpython/issues/143919
- WEBhttps://github.com/python/cpython/pull/143920
- WEBhttps://mail.python.org/archives/list/[email protected]/thread/6VFLQQEIX673KXKFUZXCUNE5AZOGZ45M/
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2026-0672