CVE-2025-3757

criticalpriority · track · 39EPSS 0.004 · 37 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.43% (37th) EPSS

CVSS 9.8 · critical

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-28

Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v4.09.3criticalCVSS: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:Ysecondary · ENISA EU

v4.09.3criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Xsecondary · cna@cloudflare.com

v4.08highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-347USprimaryCWE-305USCWE-305US

affected products (3)

Products and version ranges known to be affected.

OPKSSH OPKSSH≤ Openpubkey ≤0.9.0enisa_euvdEU
openpubkey openpubkey< 0.10.0nvdUScpe:2.3:a:openpubkey:openpubkey:*:*:*:*:*:*:*:*
Go github.com/openpubkey/openpubkey< 0.10.0osvUSpkg:golang/github.com/openpubkey/openpubkey

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-537f-gxgm-3jjqOpenPubkey Vulnerable to Authentication Bypass2025-05-13ghsa · osvUS
### Impact Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification. ### Patches Upgrade to v0.10.0 or greater. This vulnerability is not present in versions of OpenPubkey after v0.9.0. ### References [CVE-2025-3757 ](https://www.cve.org/CVERecord?id=CVE-2025-3757)
GO-2025-3679OpenPubkey Vulnerable to Authentication Bypass in github.com/openpubkey/openpubkey2025-05-15vendor · osvUS
OpenPubkey Vulnerable to Authentication Bypass in github.com/openpubkey/openpubkey

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2025-05-13modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

scry

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