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Advisory record · GHSA-ch3q-cw5r-f4hg

ConnectBot SSH Client Library: Unbounded SSH field lengths can cause excessive memory allocation

CVSS 6.9 MediumEPSS 0.0037 · 31st percentile

Published by the GitHub Advisory Database at 12 Jun 2026, 21:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.connectbot.sshlib:sshlibMaven<=0.3.0No fixed version yet
Identifiers
GHSA-ch3q-cw5r-f4hg · CVE-2026-54700
Weakness (CWE)
CWE-20 · CWE-789
Tags
Published
12 Jun 2026
Updated
8 Jul 2026

Machine-written summary

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

ConnectBot SSH Client Library (org.connectbot.sshlib:sshlib) versions up to and including 0.3.0 are affected. A malicious or compromised SSH server can send a small malformed packet with an inner length or count field far larger than the packet, causing excessive memory allocation or an OutOfMemoryError that can terminate the application; with agent forwarding enabled, the connected server can trigger the same through agent messages. Upgrade to version 0.3.1 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
6.9 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0037, the 31st percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:19 UTC First seen by agentprime
  2. 31 Oct 2026, 14:19 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.