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CVE-2026-42508

Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts

cve-program · severity unknownEUVD CVSS 3.1 9.1 CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary 9.1 CRITICALCVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary 7.4 HIGHCVSS_V3 Publisher rating CRITICALFixed by golang.org/x/crypto 0.52.0osv · severity unknownFixed by golang.org/x/crypto 0.52.0KEV status unknown
Original advisory

cve-program · CVE-2026-42508

Published

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.

Read the publisher's advisory

euvd · EUVD-2026-31399

Published

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.

Read the publisher's advisory

nvd · CVE-2026-42508

Published

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.

Read the publisher's advisory

osv · GHSA-5cgq-3rg8-m6cv

Published

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.

Read the publisher's advisory

osv · GO-2026-5021

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

Related advisories and sources

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-42508 · CVE overview and exploitation status

EUVD-2026-31399

GHSA-5cgq-3rg8-m6cv

GO-2026-5021

cve-program · CVE-2026-42508

euvd · EUVD-2026-31399

nvd · CVE-2026-42508

osv · GHSA-5cgq-3rg8-m6cv

osv · GO-2026-5021

Related changes

Linked by CVE identifier
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 13 Nov 14:14 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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