CVE-2025-15282
EPSS 0.05%Header injection via newlines in data URL mediatype
Published: 1/20/2026Modified: 5/16/2026
Description
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
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+deb11u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/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-2025-15282
- WEBhttps://github.com/python/cpython/commit/05356b1cc153108aaf27f3b72ce438af4aa218c0
- WEBhttps://github.com/python/cpython/commit/34d76b00dabde81a793bd06dd8ecb057838c4b38
- WEBhttps://github.com/python/cpython/commit/3f396ca9d7bbe2a50ea6b8c9b27c0082884d9f80
- WEBhttps://github.com/python/cpython/commit/4ed11d3cd288e6b90196a15c5a825a45d318fe47
- WEBhttps://github.com/python/cpython/commit/a35ca3be5842505dab74dc0b90b89cde0405017a
- WEBhttps://github.com/python/cpython/commit/f25509e78e8be6ea73c811ac2b8c928c28841b9f
- WEBhttps://github.com/python/cpython/issues/143925
- WEBhttps://github.com/python/cpython/pull/143926
- WEBhttps://mail.python.org/archives/list/[email protected]/thread/X66HL7SISGJT33J53OHXMZT4DFLMHVKF/
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2025-15282