🛡️ JLSEC-2026-45 — libpq-jll
Description
A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.
Affected software
JLSEC-2026-45 is recorded against 1 package.
- libpq-jll
Timeline and source
Published on 3 April 2026 and last revised on 25 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
Details
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| libpq-jll | — | — |
References
Similar Threats
- Unknown JLSEC-2026-24
- Unknown JLSEC-2026-25
- Unknown JLSEC-2026-26
- Unknown JLSEC-2026-27
- Unknown JLSEC-2026-28
More JLSEC 2026 advisories
Browse all of JLSEC 2026 in the advisory index.
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