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Advisory record · GHSA-hw43-fcmm-3m5g

Emissary May Use a Broken or Risky Cryptographic Algorithm

CVSS 7.5 HighEPSS 0.0021 · 11th percentile

Published by the GitHub Advisory Database at 5 Mar 2025, 22:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
gov.nsa.emissary:emissaryMaven<8.24.08.24.0
Identifiers
GHSA-hw43-fcmm-3m5g · CVE-2025-27508
Weakness (CWE)
CWE-327
Tags
Published
5 Mar 2025
Updated
10 Sept 2026

Machine-written summary

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

Emissary (Maven package gov.nsa.emissary:emissary) versions before 8.24.0 have a ChecksumCalculator class that defaults to SHA-1 and also offers CRC32 and SSDEEP, algorithms unsuitable for security-sensitive uses. The source gives few details about a concrete exploit path; it describes risk if applications rely on these algorithms for integrity or authentication, where collisions could be crafted. Upgrade to version 8.24.0 or later.

Written 2 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:N/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0021, the 11th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 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.