Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The firebase/php-jwt Packagist package, versions before 7.0.0, is affected. The source describes it only as containing weak encryption and gives no further detail about the flaw or how it could be triggered, so what an attacker needs and can do is not stated. Upgrade to firebase/php-jwt 7.0.0, which the source lists as the fixed version.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0015, the 4th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:03 UTC First seen by agentprime
- 31 Oct 2026, 14:03 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-2x45-7fc3-mxwq
- OSV: GHSA-2x45-7fc3-mxwq
- nvd.nist.gov/vuln/detail/CVE-2025-45769
- github.com/firebase/php-jwt/issues/611
- github.com/firebase/php-jwt/issues/618
- github.com/firebase/php-jwt/issues/620
- github.com/firebase/php-jwt/pull/613
- github.com/github/advisory-database/pull/6954
- github.com/firebase/php-jwt/commit/6b80341bf57838ea2d011487917337901cd71576
- gist.github.com/ZupeiNie/83756316c4c24fe97a50176a92608db3
- github.com/advisories/GHSA-2x45-7fc3-mxwq
- github.com/firebase
- github.com/firebase/php-jwt
- github.com/firebase/php-jwt/releases/tag/v7.0.0