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Advisory record · GHSA-chg9-3c3p-ch23

Lemur uses static IV per key

CVSS 7.5 HighEPSS 0.015 · 74th percentile

Published by the GitHub Advisory Database at 13 May 2022, 01:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
lemurPyPI<0.1.50.1.5
Identifiers
GHSA-chg9-3c3p-ch23 · CVE-2015-7764 · PYSEC-2017-50
Weakness (CWE)
CWE-331
Tags
Published
13 May 2022
Updated
10 Sept 2026

Machine-written summary

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

Lemur versions before 0.1.5 use a static IV per key when encrypting with AES in CBC mode. The source gives few details on how this can be exploited or what an attacker must be able to do. Upgrade lemur to version 0.1.5 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.015, the 74th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:37 UTC First seen by agentprime
  2. 31 Oct 2026, 14:37 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.