Advisory record · GHSA-gxp5-mv27-vjcj

Jervis's AES CBC Mode is Without Authentication

CVSS 8.7 HighEPSS 0.0020 · 9th percentile

Published by the GitHub Advisory Database at 13 Jan 2026, 14:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
net.gleske:jervisMaven<2.22.2
Identifiers
GHSA-gxp5-mv27-vjcj · CVE-2025-68931
Weakness (CWE)
CWE-287 · CWE-327
Published
13 Jan 2026
Updated
3 Feb 2026

Machine-written summary

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

Jervis (Maven net.gleske:jervis) versions before 2.2 use AES/CBC/PKCS5Padding without authentication, which makes encrypted data open to padding oracle attacks and ciphertext manipulation. The source says the risk is low for internal use of the library, but could be critical for any consumer that calls these methods directly, and that Jervis's own use is unlikely to be affected because of an encrypted-key design and a SHA-256 checksum check. Upgrade to Jervis 2.2, which moves to AES/GCM/NoPadding. The source lists no workarounds.

Written 7 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
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0020, the 9th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:09 UTC First seen by agentprime
  2. 31 Oct 2026, 15:09 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.