CVE-2026-39829

Aliases:GO-2026-5018GHSA-w879-237q-wc7r
Advisory lineage Upstream: 0 Downstream: 55
Analyzed
Published: 22 May 2026, 02:31
Last modified:22 Jul 2026, 12:08

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.4% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 May 2026, 02:31
Published
Vulnerability first disclosed
22 Jul 2026, 12:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.40%• Percentile: 32%

Techniques & Countermeasures

  • CWE-347•Improper Verification of Cryptographic Signature

    The product does not verify, or incorrectly verifies, the cryptographic signature for data.

  • CWE-1284•Improper Validation of Specified Quantity in Input

    The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

Affected Systems

  • golang•crypto

    < 0.52.0

  • golang.org/x•crypto

    < 0.52.0

  • golang.org/x/crypto•ssh

    < 0.52.0

  • golang.org/x/crypto•golang.org/x/crypto/ssh

    < 0.52.0

References (48)