CVE-2026-39829

7.5 HIGH
Published: May 22, 2026 Modified: June 02, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://go.dev/cl/781641
Source: security@golang.org
Issue Tracking
https://go.dev/cl/781661
Source: security@golang.org
Issue Tracking
https://go.dev/issue/79565
Source: security@golang.org
Issue Tracking
https://groups.google.com/g/golang-announce/c/a082jnz-LvI
Source: security@golang.org
Mailing List
https://pkg.go.dev/vuln/GO-2026-5018
Source: security@golang.org
Vendor Advisory

5 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.3%
19th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

golang