Vulnerability · Published May 13, 2025 · Assigned by cloudflare
CVE-2025-3757Authentication Bypass in OpenPubKey
Critical 9.3
In plain English
A critical-severity security flaw in OPKSSH from OPKSSH. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)0.4%top 62.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | golang-github-openpubkey-openpubkey | no fix listed | DEBIAN-CVE-2025-3757 |
| Debian:14 | golang-github-openpubkey-openpubkey | 0.18.0-1 | DEBIAN-CVE-2025-3757 |
| Go | github.com/openpubkey/openpubkey | 0.10.0 | GO-2025-3679 |
| Go | github.com/openpubkey/openpubkey | 0.10.0 | GHSA-537f-gxgm-3jjq |
| Ubuntu:25.10 | golang-github-openpubkey-openpubkey | no fix listed | UBUNTU-CVE-2025-3757 |
| Ubuntu:26.04:LTS | golang-github-openpubkey-openpubkey | no fix listed | UBUNTU-CVE-2025-3757 |
| Ubuntu:26.10 | golang-github-openpubkey-openpubkey | no fix listed | UBUNTU-CVE-2025-3757 |
Affected products (as reported)
Weakness: CWE-305 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L/AU:Y