How severe is CVE-2025-45770?

CVE-2025-45770 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2025-45770 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-45770?

CVE-2025-45770 affects Jwt Project Jwt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-45770?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-45770 have an EU (EUVD) identifier?

Yes. CVE-2025-45770 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23299.

When was CVE-2025-45770 published?

CVE-2025-45770 was published on 2025-07-31 and last updated on 2026-06-17.

CVE-2025-45770

CVE-2025-45770 is a high-severity vulnerability in Jwt Project Jwt with a CVSS 3.x base score of 7.0. 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-326.

Key facts

Severity: High (CVSS 3.x base score 7.0)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23299
Weakness: CWE-326
Affected product: Jwt Project Jwt
Published: 2025-07-31
Last modified: 2026-06-17

Description

jwt v5.4.3 was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1.4, 4.1.14, and other rules; the dispute tagging is not meant to recommend an outcome for this CVE Record.

Frequently asked questions

What is CVE-2025-45770?: jwt v5.4.3 was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1.4, 4.1.14, and other rules; the dispute tagging is not meant to recommend an outcome for this CVE Record.
How severe is CVE-2025-45770?: CVE-2025-45770 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2025-45770 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-45770?: CVE-2025-45770 affects Jwt Project Jwt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-45770?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-45770 have an EU (EUVD) identifier?: Yes. CVE-2025-45770 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23299.
When was CVE-2025-45770 published?: CVE-2025-45770 was published on 2025-07-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jwt_project:jwt:*:*:*:*:*:*:*:*

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