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Advisory record · GHSA-wwvv-x5mq-h3jj

Use of Cryptographically Weak Pseudo-Random Number Generator in yiisoft/yii2-dev

CVSS 8.1 HighEPSS 0.017 · 77th percentile

Published by the GitHub Advisory Database at 1 Sept 2021, 18:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
yiisoft/yii2-devPackagist<2.0.432.0.43
Identifiers
GHSA-wwvv-x5mq-h3jj · CVE-2021-3692 · PKSA-26mg-s28k-sb3m
Weakness (CWE)
CWE-330 · CWE-338 · CWE-1241
Tags
Published
1 Sept 2021
Updated
8 Nov 2023

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Yii 2 package yiisoft/yii2-dev versions before 2.0.43 are affected. The source gives few details, but it describes the issue as use of a predictable algorithm in a random number generator, which can allow an attacker to predict generated values. Upgrade yiisoft/yii2-dev to version 2.0.43 or later.

Written 5 Nov 2026.

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

ScoreRatingCVSSVectorSource
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 0.017, the 77th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:33 UTC First seen by agentprime
  2. 31 Oct 2026, 14:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.