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Vulnerability details

8.2/10
CVSS 4.0
CVE-2026-54291
resolved Published 2026-07-06 Updated 2026-07-09
NVD MITRE OpenCVE
Vulnerability Data from Dependency-Track
Affected versions
Scores
8.2 CVSS 4.0 NVD CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N displayed
5.9 CVSS 3.1 NVD CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Description
pgjdbc is an open source postgresql JDBC Driver. In releases 42.7.4 through 42.7.11, channelBinding=require connections can be silently downgraded from SCRAM-SHA-256-PLUS with channel binding to plain SCRAM-SHA-256 without it, losing the man-in-the-middle protection the setting is meant to guarantee. An attacker who can intercept the TLS connection can trigger the downgrade with a certificate whose signature algorithm has no tls-server-end-point channel-binding hash, because the bundled com.ongres.scram:scram-client returns an empty byte array instead of failing and pgJDBC ScramAuthenticator checks only that the server advertised a PLUS mechanism, without rejecting the empty binding or checking that the negotiated mechanism uses channel binding. This issue is fixed in version 42.7.12.
Same vulnerability as
GHSA-j92g-9f8w-j867 resolved according to EUVD-2026-41903
Analysis Read only
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