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CVE Vulnerability Details :
CVE-2026-42508
PUBLISHED
More InfoOfficial Page
Assigner-Go
Assigner Org ID-1bb62c36-49e3-4200-9d77-64a1400537cc
View Known Exploited Vulnerability (KEV) details
Published At-22 May, 2026 | 02:31
Updated At-22 May, 2026 | 18:44
Rejected At-
▼CVE Numbering Authority (CNA)
Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts

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.

Affected Products
Vendor
golang.org/x/crypto
Product
golang.org/x/crypto/ssh/knownhosts
Collection URL
https://pkg.go.dev
Package Name
golang.org/x/crypto/ssh/knownhosts
Program Routines
  • hostKeyDB.IsRevoked
Default Status
unaffected
Versions
Affected
  • From 0 before 0.52.0 (semver)
Problem Types
TypeCWE IDDescription
N/AN/ACWE-295: Improper Certificate Validation
Type: N/A
CWE ID: N/A
Description: CWE-295: Improper Certificate Validation
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://go.dev/issue/79568
N/A
https://go.dev/cl/781220
N/A
https://groups.google.com/g/golang-announce/c/a082jnz-LvI
N/A
https://pkg.go.dev/vuln/GO-2026-5021
N/A
Hyperlink: https://go.dev/issue/79568
Resource: N/A
Hyperlink: https://go.dev/cl/781220
Resource: N/A
Hyperlink: https://groups.google.com/g/golang-announce/c/a082jnz-LvI
Resource: N/A
Hyperlink: https://pkg.go.dev/vuln/GO-2026-5021
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
3.19.1CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Version: 3.1
Base score: 9.1
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found