CVE-2025-45770 json
jwt v5.4.3 was discovered to contain weak encryption.
published 2025-07-31 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-23299
- cvss
- 7.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 15 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H |
| CNA | 3.1 | 7.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H |
Classification
- Weakness
-
- CWE-326 Inadequate Encryption Strength
References
-
github.com
/lcobucci
product
-
github.com
/lcobucci/jwt
product
-
gist.github.com
/ZupeiNie/cd88c827eef11a1618f8baacccd240fb
third-party-advisory
Sources
- CVE List CVE-2025-45770
- NVD CVE-2025-45770
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