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CVE-2026-1502
HTTP client proxy tunnel headers not validated for CR/LF
Medium5.7EPSS 0.56%
- Published
- Updated
- Reserved
- Assigned by
- PSF
Description
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| PSFCNA (assigner) | 4.0 | Medium5.7 | CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Awaiting Analysis | 4.0 | Medium5.7 | CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/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 |
- EPSS (exploitation in 30 days)
- 0.56% · top 53% of all CVEs (4 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 5.7.
Weakness
Affected products
Python Software Foundation · CPython
- affected < 3.10.21
- affected 3.11.0 – < 3.11.16
- affected 3.12.0 – < 3.12.14
- affected 3.13.0 – < 3.13.14
- affected 3.14.0a1 – < 3.14.5rc1
- affected 3.15.0a1 – < 3.15.0b1
References (10)
- https://github.com/python/cpython/pull/146212 (opens in a new tab)patch
- https://github.com/python/cpython/issues/146211 (opens in a new tab)issue-tracking
- https://mail.python.org/archives/list/[email protected]/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/ (opens in a new tab)vendor-advisory
- https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69 (opens in a new tab)patch
- https://github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed (opens in a new tab)patch
- https://github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd (opens in a new tab)patch
- https://github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec (opens in a new tab)patch
- https://github.com/python/cpython/commit/56b7100b04e44ea27989242b176beb8f016b2c53 (opens in a new tab)patch
- https://github.com/python/cpython/commit/58703ec1bdd1eb075e8b01a0c427683ce594dd3e (opens in a new tab)patch
- http://www.openwall.com/lists/oss-security/2026/04/11/4 (opens in a new tab)
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-2026-1502)Record last updated .