CVE-2026-6638

high

Published 2026-05-14 · Modified 2026-05-18

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CVSS v3

8.8

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.8

Description

SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.

Predictions

Exploit likelihood

92%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Windows Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 3 releases

Version	Status	Fixed in
trixie	Fixed	`17.10-0+deb13u1`
sid	Fixed	`18.4-1`
forky	Fixed	`18.4-1`

Application impact

Vendor	Product	Versions	Fixed
postgresql	postgresql	`{"startIncluding":"16.0","endExcluding":"16.14"}`	`16.14`
postgresql	postgresql	`{"startIncluding":"17.0","endExcluding":"17.10"}`	`17.10`
postgresql	postgresql	`{"startIncluding":"18.0","endExcluding":"18.4"}`	`18.4`

References

CWEs

CWE-89

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.