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CVE-2026-39829

Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh

Published: May 22, 2026Updated: Aug 6, 2026 Sources: CVE List NVD BDUCWE-347
7.5HIGH
NVD MITRE
EPSS Score
0.5%
Top 61.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-347CWE-1284

Affected Products

golang
oss-project·US
crypto
OSS Libraries
golang.org/x/crypto
oss-projectaka x/crypto, golang x crypto
golang.org/x/crypto/sshLibrary
OSS Libraries / go
The Go Project
oss-projectaka go, golang-google-protobuf, crypto
crypto
OSS Libraries

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://go.dev/cl/781641
go.dev
https://go.dev/cl/781661
go.dev
https://go.dev/issue/79565
go.dev
and 56 more references View all →

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