---
cve: "CVE-2026-42508"
severity: "CRITICAL"
cvss: 9.1
epss: "7.3%"
vendor: "golang.org/x/crypto"
kev: false
exploited: false
published: "2026-05-22 04:16:25"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T01:16:38+02:00"
---

# CVE-2026-42508

> 9.1 CRITICAL

## Beschreibung

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- a1c0d9929856c8aba2b31f079340f00578eda803 (Commit)

## Referenzen

- <https://go.dev/issue/79568>
- <https://go.dev/cl/781220>
- <https://groups.google.com/g/golang-announce/c/a082jnz-LvI>
- <https://pkg.go.dev/vuln/GO-2026-5021>
- <https://access.redhat.com/errata/RHSA-2026:23262>
- <https://access.redhat.com/errata/RHSA-2026:23264>
- <https://access.redhat.com/errata/RHSA-2026:26546>
- <https://access.redhat.com/errata/RHSA-2026:26547>
- <https://access.redhat.com/errata/RHSA-2026:35833>
- <https://access.redhat.com/errata/RHSA-2026:36648>
- <https://access.redhat.com/errata/RHSA-2026:36651>
- <https://access.redhat.com/errata/RHSA-2026:36796>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-42508) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_