Header injection via newlines in data URL mediatype
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
02 / AFFECTED SOFTWARE
Affected packages
212 explicit affected versions
400 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
05 / REFERENCES
Further evidence
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15282.json
- https://github.com/python/cpython
- https://github.com/python/cpython/commit/05356b1cc153108aaf27f3b72ce438af4aa218c0
- https://github.com/python/cpython/commit/34d76b00dabde81a793bd06dd8ecb057838c4b38
- https://github.com/python/cpython/commit/3f396ca9d7bbe2a50ea6b8c9b27c0082884d9f80
- https://github.com/python/cpython/commit/4ed11d3cd288e6b90196a15c5a825a45d318fe47
- https://github.com/python/cpython/commit/a35ca3be5842505dab74dc0b90b89cde0405017a
- https://github.com/python/cpython/commit/f25509e78e8be6ea73c811ac2b8c928c28841b9f
- https://github.com/python/cpython/issues/143925
- https://github.com/python/cpython/pull/143926
- https://mail.python.org/archives/list/[email protected]/thread/X66HL7SISGJT33J53OHXMZT4DFLMHVKF/
- https://nvd.nist.gov/vuln/detail/CVE-2025-15282