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Advisory record · GHSA-6r69-c6wg-7g8m

yopass Prometheus metrics middleware allows remote memory exhaustion through unbounded method labels

CVSS 7.5 HighEPSS 0.0044 · 38th percentile

Published by the GitHub Advisory Database at 9 Oct 2026, 20:42 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/jhaals/yopassGo<0.0.0-20260727191436-61e31ead04a40.0.0-20260727191436-61e31ead04a4
Identifiers
GHSA-6r69-c6wg-7g8m · CVE-2026-107840 · GO-2026-6720
Weakness (CWE)
CWE-400
Tags
Published
9 Oct 2026
Updated
19 Oct 2026

Machine-written summary

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

Versions of yopass (github.com/jhaals/yopass) before 0.0.0-20260727191436-61e31ead04a4 use raw HTTP method names as Prometheus metric labels. An unauthenticated attacker can send requests with arbitrary methods to grow memory until the process is killed, and /metrics scrapes slow or time out. Upgrade to 0.0.0-20260727191436-61e31ead04a4 or later.

Written 1 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:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0044, the 38th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:11 UTC First seen by agentprime
  2. 31 Oct 2026, 14:11 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.