Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-g4mp-vgx3-xrvm

pageant: Out-of-bounds read / oversized allocation in `pageant` MemoryMap::read via a malicious Pageant agent (Windows)

CVSS 6.2 MediumEPSS 0.0019 · 8th percentile

Published by the GitHub Advisory Database at 30 Sept 2026, 23:41 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
pageantcrates.io<0.2.30.2.3
Identifiers
GHSA-g4mp-vgx3-xrvm · CVE-2026-102820
Weakness (CWE)
CWE-125 · CWE-789
Tags
Published
30 Sept 2026
Updated
1 Oct 2026

Machine-written summary

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

The pageant crate before 0.2.3 on Windows reads a peer-controlled number of bytes from shared memory without a bounds check. A local process posing as the Pageant SSH agent can crash an SSH client that uses it, trigger a large memory allocation, or sometimes read adjacent memory. Upgrade pageant to 0.2.3 or later.

Written 3 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
6.2 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0019, the 8th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:24 UTC First seen by agentprime
  2. 31 Oct 2026, 14:24 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.