How severe is CVE-2026-6479?

CVE-2026-6479 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-6479 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6479?

CVE-2026-6479 affects Postgresql. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6479?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-6479 have an EU (EUVD) identifier?

Yes. CVE-2026-6479 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30288.

When was CVE-2026-6479 published?

CVE-2026-6479 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-6479

CVE-2026-6479 is a high-severity vulnerability in Postgresql with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30288
Weakness: CWE-674
Affected product: Postgresql
Published: 2026-05-14
Last modified: 2026-06-17

Description

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Frequently asked questions

What is CVE-2026-6479?: Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
How severe is CVE-2026-6479?: CVE-2026-6479 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-6479 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6479?: CVE-2026-6479 affects Postgresql. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6479?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-6479 have an EU (EUVD) identifier?: Yes. CVE-2026-6479 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30288.
When was CVE-2026-6479 published?: CVE-2026-6479 was published on 2026-05-14 and last updated on 2026-06-17.

References

https://www.postgresql.org/support/security/CVE-2026-6479/

Affected products (1)

cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*

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