CVE-2025-3757
CVE-2025-3757 is a critical-severity vulnerability in Openpubkey with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 9.3
- EPSS exploit prediction: 0% (28th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-14478
- Weakness: CWE-347
- Affected product: Openpubkey
- Published:
- Last modified:
Description
Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.
Frequently asked questions
- What is CVE-2025-3757?
- Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.
- How severe is CVE-2025-3757?
- CVE-2025-3757 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-3757 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-3757?
- CVE-2025-3757 affects Openpubkey. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-3757?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-3757 have an EU (EUVD) identifier?
- Yes. CVE-2025-3757 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14478.
- When was CVE-2025-3757 published?
- CVE-2025-3757 was published on 2025-05-13 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:openpubkey:openpubkey:*:*:*:*:*:*:*:*
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