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Advisory record · GHSA-p47f-322f-whfh

QOS.CH Sarl logback logback-core has a deserialization of untrusted data vulnerability

CVSS 2.9 LowEPSS 0.0037 · 31st percentile

Published by the GitHub Advisory Database at 28 May 2026, 15:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
ch.qos.logback:logback-coreMaven<1.5.331.5.33
Identifiers
GHSA-p47f-322f-whfh · CVE-2026-9828
Weakness (CWE)
CWE-502
Tags
Published
28 May 2026
Updated
10 Sept 2026

Machine-written summary

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

Logback-core, the ch.qos.logback:logback-core Maven package, is vulnerable in versions before 1.5.33. An attacker who can influence serialized data sent to SimpleSocketServer or SimpleSSLSocketServer can instantiate some classes from java.lang and java.util, bypassing intended deserialization restrictions. The source gives few details on impact and says no practical remote code execution has been identified. Upgrade to logback-core 1.5.33 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
2.9 Low 4.0 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/RE:L/U:Green CNA (NCSC.ch)
  • 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, 14:17 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.