Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The yiisoft/yii2-dev package is affected in versions before 2.0.43. The source gives few details beyond the vulnerability class, which is use of a predictable algorithm in a random number generator, so the impact on applications is not described. Upgrade to version 2.0.43, which is the listed fix.
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 |
|---|---|---|---|---|
| 8.1 | High | 3.0 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA (@huntrdev) |
- CISA KEV Not listed.
- EPSS 0.019, the 79th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:33 UTC First seen by agentprime
- 31 Oct 2026, 14:33 UTC Confirmed by OSV