# CVE-2026-111943: Distrust compromised intermediate certificates in crypto/x509

> CVE-2026-111943: Distrust compromised intermediate certificates in crypto/x509. CVSS n/a, named in 2 status incident(s).

Canonical: https://rewindex.com/cve/CVE-2026-111943
Last updated: 2026-10-22T16:18:19Z

- Published: 2026-10-21 00:52 UTC · Updated: 2026-10-22 16:18 UTC · Assigner: Go
- CVSS: n/a · Severity: Not scored
- EPSS: 0.30%, 22th percentile (scored 2026-10-25)
- CISA KEV: no

## 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.

## Affected vendors and products

- Go standard library: crypto/x509

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)
- [Google Cloud](https://rewindex.com/company/google-cloud.md)

## Status incidents that name it

- 2026-10-22 17:38 UTC [Redpanda: CVE-2026-111943 (emudhra) Response](https://rewindex.com/company/redpanda/incidents/01M5JB3FV469H72YGGCXXJV963.md) (says not affected, matched “not impacted” elsewhere in the notice): “CVE-2026-111943 (emudhra) Response Redpanda has reviewed and confirmed that Redpanda Cloud and its associated applications are not at…”
- 2026-10-20 02:53 UTC [Teleport: Security Maintenance](https://rewindex.com/company/teleport/incidents/gzpxt06ftn8z.md) (says not affected, matched “no action is required” elsewhere in the notice): “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…”

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-111943)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-111943)
- [https://go.dev/cl/851047](https://go.dev/cl/851047)
- [https://go.dev/issue/82345](https://go.dev/issue/82345)
- [https://groups.google.com/g/golang-announce/c/66pojueaQek](https://groups.google.com/g/golang-announce/c/66pojueaQek)
- [https://pkg.go.dev/vuln/GO-2026-6809](https://pkg.go.dev/vuln/GO-2026-6809)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-111943 · Markdown: https://rewindex.com/cve/CVE-2026-111943.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-111943 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:06:17.196Z