CVE-2026-42508— Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts
Possible ATT&CK Techniques 1AI
T1553 · Subvert Trust ControlsAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/knownhosts | < 0.52.0 | affected |
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I. Basic Information for CVE-2026-42508
Vulnerability Information
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Vulnerability Title
Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/knownhosts | 0 ~ 0.52.0 | - |
II. Public POCs for CVE-2026-42508
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Patches & Fixes for CVE-2026-42508 (1)
Vendor Advisories for CVE-2026-42508 (2)
Other References for CVE-2026-42508 (1)
Same Patch Batch · golang.org/x/crypto · 2026-05-22 · 13 CVEs total
| CVE-2026-39829 | Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh | |
| CVE-2026-39835 | Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh | |
| CVE-2026-39831 | Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh | |
| CVE-2026-39833 | Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent | |
| CVE-2026-39834 | Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh | |
| CVE-2026-39830 | Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ | |
| CVE-2026-39828 | Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh | |
| CVE-2026-39827 | Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh | |
| CVE-2026-39832 | Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent | |
| CVE-2026-46597 | Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh | |
| CVE-2026-46598 | Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent | |
| CVE-2026-46595 | Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ss |
IV. Related Vulnerabilities
Same vendor: golang.org/x/crypto
- CVE-2026-46598
Invoking pathological inputs can lead to client panic in go - CVE-2026-39834
Invoking infinite loop on large channel writes in golang.or - CVE-2026-46595
Invoking VerifiedPublicKeyCallback permissions skip enforce - CVE-2026-39829
Invoking pathological RSA/DSA parameters may cause DoS in g - CVE-2026-39835
Invoking server panic during CheckHostKey/Authenticate in g
V. Comments for CVE-2026-42508
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