5.7

CVE-2026-1502

HTTP client proxy tunnel headers not validated for CR/LF

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerPython Software Foundation
≫
Produkt CPython
Default Statusunaffected
Version 0
Version < 3.13.14
Status affected
Version 3.14.0a1
Version < 3.14.5rc1
Status affected
Version 3.15.0a1
Version < 3.15.0b1
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.56% 0.426
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
cna@python.org 5.7 0 0
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
CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

https://github.com/python/cpython/pull/146212
https://github.com/python/cpython/issues/146211
https://mail.python.org/archives/list/security-announce@python.org/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/
https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69
http://www.openwall.com/lists/oss-security/2026/04/11/4
https://github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed
https://github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd
https://github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec
https://github.com/python/cpython/commit/56b7100b04e44ea27989242b176beb8f016b2c53
https://github.com/python/cpython/commit/58703ec1bdd1eb075e8b01a0c427683ce594dd3e