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Advisory record · GHSA-c857-9x2m-cvh2

org.mariadb:r2dbc-mariadb vulnerable to cleartext password disclosure to a man-in-the-middle server (clear-text auth plugins not gated on a secure transport)

CVSS 5.9 MediumEPSS 0.0023 · 13th percentile

Published by the GitHub Advisory Database at 28 Aug 2026, 22:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.mariadb:r2dbc-mariadbMaven<1.4.11.4.1
Identifiers
GHSA-c857-9x2m-cvh2 · CVE-2026-55860
Weakness (CWE)
CWE-319 · CWE-522
Tags
Published
28 Aug 2026
Updated
28 Aug 2026

Machine-written summary

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

The org.mariadb:r2dbc-mariadb package before 1.4.1 sends clear-text password authentication plugins over unencrypted connections. An attacker positioned as a man-in-the-middle, or a hostile server, can request a clear-text plugin and capture the user's password, which can then be used against the database. Upgrade to org.mariadb:r2dbc-mariadb 1.4.1 or later; until then, use certificate verification with a verifying SSL mode such as VERIFY_CA or VERIFY_FULL.

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
5.9 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0023, the 13th percentile, on 7 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.