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CVE-2026-19552
ssl.get_server_certificate(addr, ca_certs=...) verifies the chain but never the identity
- 0.0NoneCVSS base score
- 0.31%Exploitation in 30 daysEPSS · top 75% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
When ca_certs parameter was supplied to ssl.get_server_certificate() function, the identity of the certificate is not checked.
Timeline
ID reserved
By PSF
- 3 months later
· 3 months later
Published
- 2 days later
· 2 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 | None0.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Awaiting Analysis | 4.0 | None0.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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)
- 0.31% · top 75% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: None 0.0.
Affected products
Python Software Foundation · CPython
- affected < 3.16.0a2
References
References5
- https://github.com/python/cpython/pull/161507 (opens in a new tab)patch
- https://github.com/python/cpython/issues/161503 (opens in a new tab)issue-tracking
- https://mail.python.org/archives/list/[email protected]/thread/SXBD6BGHDBTGM4KSUMQEWYIQ5RO4BQ76/ (opens in a new tab)vendor-advisory
- https://github.com/python/cpython/commit/8dde46eaa6baf5f027a7234845b20d50b509624e (opens in a new tab)patch
- http://www.openwall.com/lists/oss-security/2026/11/09/25 (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)
- EUVD EUVD-2026-120066 (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)
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[](https://cveledger.app/cve/CVE-2026-19552)Record last updated .