CVE-2026-39829
HIGHInvoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh
Title source: cnaDescription
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.
References (5)
Core 5
Scores
CVSS v3
7.5
EPSS
0.0028
EPSS Percentile
19.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-347
Status
published
Products (2)
golang/crypto
< 0.52.0
golang.org/x/crypto/golang.org/x/crypto/ssh
< 0.52.0
Published
May 22, 2026
Tracked Since
May 22, 2026