Back
CVE-2025-15282
Header injection via newlines in data URL mediatype
Medium6.0EPSS 0.54%
- Published
- Updated
- Reserved
- Assigned by
- PSF
Description
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
Timeline
ID reserved
By PSF
- 22 days later
· 22 days later
Published
- 42 days later
· 42 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| PSFCNA (assigner) | 4.0 | Medium6.0 | 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 |
| NVDNVD · Deferred | 4.0 | Medium6.0 | 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 |
- EPSS (exploitation in 30 days)
- 0.54% · top 54% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.0.
Weakness
Affected products
Python Software Foundation · CPython
- affected < 3.10.20
- affected 3.11.0 – < 3.11.15
- affected 3.12.0 – < 3.12.13
- affected 3.13.0 – < 3.13.12
- affected 3.14.0 – < 3.14.3
- affected 3.15.0a1 – < 3.15.0a6
References (9)
- https://github.com/python/cpython/pull/143926 (opens in a new tab)patch
- https://github.com/python/cpython/issues/143925 (opens in a new tab)issue-tracking
- https://mail.python.org/archives/list/[email protected]/thread/X66HL7SISGJT33J53OHXMZT4DFLMHVKF/ (opens in a new tab)vendor-advisory
- https://github.com/python/cpython/commit/f25509e78e8be6ea73c811ac2b8c928c28841b9f (opens in a new tab)patch
- https://github.com/python/cpython/commit/05356b1cc153108aaf27f3b72ce438af4aa218c0 (opens in a new tab)patch
- https://github.com/python/cpython/commit/34d76b00dabde81a793bd06dd8ecb057838c4b38 (opens in a new tab)patch
- https://github.com/python/cpython/commit/3f396ca9d7bbe2a50ea6b8c9b27c0082884d9f80 (opens in a new tab)patch
- https://github.com/python/cpython/commit/4ed11d3cd288e6b90196a15c5a825a45d318fe47 (opens in a new tab)patch
- https://github.com/python/cpython/commit/a35ca3be5842505dab74dc0b90b89cde0405017a (opens in a new tab)patch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-15282)Record last updated .