CVE-2026-111943Distrust compromised intermediate certificates in crypto/x509
Updated under an hour ago ()
Does this affect you?
It affects Go standard library crypto/x509. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.
- CVSS
- Not yet scored
- Weakness (CWE)
- CWE-299
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Go
- NVD analysis
- Received
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 21, 2026
Affected products
Go standard library crypto/x509 go_standard_library:crypto_x509 (from the name) | before 1.26.10; from 1.27.0-0 before 1.27.3 | CNA record |
References
- https://go.dev/cl/851047
- https://go.dev/issue/82345
- https://groups.google.com/g/golang-announce/c/66pojueaQek
- https://pkg.go.dev/vuln/GO-2026-6809
- http://www.openwall.com/lists/oss-security/2026/10/20/29
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.