CRITICAL 9.1 Microsoft
CVE-2026-42508
Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts
Microsoft Security Update 2026-May: Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts
Affected Products
- azl3 packer 1.9.5-13 on Azure Linux 3.0
- azl3 telegraf 1.31.0-19 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42508
- https://nvd.nist.gov/vuln/detail/CVE-2026-42508
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-05-12 via Microsoft. EPSS score: 6.9% (top 6% of all CVEs by exploitation probability). Affected: azl3 packer 1.9.5-13 on Azure Linux 3.0, azl3 telegraf 1.31.0-19 on Azure Linux 3.0.
Risk Timeline
CVE Disclosed2026-05-12 · 173 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42508NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-42508Related Vulnerabilities
| CVE | Title | Severity | CVSS |
|---|---|---|---|
| CVE-2026-110264 | Integer Overflow or Wraparound in GitLab | CRITICAL | 10.0 |
| CVE-2026-94603 | Podman: The `podman run` command can be instructed to disable almost all sandbox | CRITICAL | 10.0 |
| CVE-2026-39821 | Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/ne | CRITICAL | 10.0 |
| CVE-2026-42960 | Possible cache poisoning via promiscuous records for the authority section | CRITICAL | 10.0 |
| CVE-2026-46595 | Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x | CRITICAL | 10.0 |
| CVE-2025-32433 PoC | Erlang/OTP SSH Vulnerable to Pre-Authentication RCE | CRITICAL | 10.0 |
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