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CVE-2026-0865 wsgiref.headers.Headers allows header newline injection

🗓️ 20 Jan 2026 21:26:15Reported by GoogleType 
osv
 osv🔗 osv.dev👁 4 Views

CVE-2026-0865: User controlled header names and values with newlines can inject HTTP headers.

Related
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM App Connect Enterprise Certified Container UBI updates
2 Jul 202610:48
–ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities found in CICS Transaction Gateway for Multiplatforms.
21 May 202614:27
–ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to multiple Operator package issues
18 Jun 202620:00
–ibm
ATTACKERKB		CVE-2026-0865
20 Jan 202621:26
–attackerkb
Tenable Nessus		Amazon Linux 2023 : python3.13, python3.13-devel, python3.13-freethreading (ALAS2023-2026-1437)
19 Feb 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3.12, python3.12-devel, python3.12-idle (ALAS2023-2026-1444)
19 Feb 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3.11, python3.11-devel, python3.11-idle (ALAS2023-2026-1447)
6 Mar 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3, python3-devel, python3-idle (ALAS2023-2026-1583)
13 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : python3, --advisory ALAS2-2026-3184 (ALAS-2026-3184)
6 Mar 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : python, --advisory ALAS2-2026-3185 (ALAS-2026-3185)
6 Mar 202600:00
–nessus
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SourceLink
githubwww.github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0865.json
mailwww.mail.python.org/archives/list/[email protected]/thread/BJ6QPHNSHJTS3A7CFV6IBMCAP2DWRVNT/
nvdwww.nvd.nist.gov/vuln/detail/CVE-2026-0865
githubwww.github.com/python/cpython/issues/143916
githubwww.github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee58
githubwww.github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c510
githubwww.github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5f
githubwww.github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d2
githubwww.github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c5
githubwww.github.com/python/cpython/commit/66da7bf6fe7b81e3ecc9c0a25bd47d4616c8d1a6
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15 Jul 2026 01:49Current
6.7Medium risk
Vulners AI Score6.7
CVSS 45.9
EPSS0.00463
header injectionnewline headershypertext transfer protocoluser controlled headers
4