CVE-2026-39829High· 7.5▾ TwilightThe RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.4%
0.4% → 0.5%
Last analysed / modified upstream
The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.
crypto < 0.52.0Upgrade past the affected range:
crypto 0.52.0Affected packages:
golang.org/x/crypto/ssh < 0.52.0Patched in:
golang.org/x/crypto/ssh 0.52.0Connected by shared product, vendor, weakness, or advisory.
CVE-2026-39832Critical· 9.1When adding a key to a remote agent constraint extensions such as [email protected] were not serialized in the request
CVE-2026-39835Medium· 5.3SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate
CVE-2026-39830Critical· 9.1A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop
CVE-2026-42508Critical· 9.1Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation
CVE-2026-33814High· 7.5When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.
CVE-2026-39821Critical· 9.6The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label