CVE-2026-111943: Distrust compromised intermediate certificates in crypto/x509
Not scoredEPSS 0.30%, 22th percentilePublished Updated Assigner: Go
Description
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.
0Tracked companies
Amazon Web ServicesGoogle Cloud
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
- · No impact listed · says not affected (notice says “not impacted”)
“CVE-2026-111943 (emudhra) Response Redpanda has reviewed and confirmed that Redpanda Cloud and its associated applications are not at…”
- · No impact listed · says not affected (notice says “no action is required”)
“Security Maintenance We continue to mitigate CVE-2026-111943. We have fully patched all Cloud tenants (control plane, tools, and agents). We continue to patch all other…”
Affected vendors and products
Go standard library: crypto/x509
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- go.dev/cl/851047 (opens in new tab)
- go.dev/issue/82345 (opens in new tab)
- groups.google.com/g/golang-announce/c/66pojueaQek (opens in new tab)
- pkg.go.dev/vuln/GO-2026-6809 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)