How severe is CVE-2025-12818?

CVE-2025-12818 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-12818 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-12818?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-12818 have an EU (EUVD) identifier?

Yes. CVE-2025-12818 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-169291.

When was CVE-2025-12818 published?

CVE-2025-12818 was published on 2025-11-13 and last updated on 2026-06-17.

CVE-2025-12818

CVE-2025-12818 is a medium-severity vulnerability with a CVSS 3.x base score of 5.9. 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-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-169291
Weakness: CWE-190
Published: 2025-11-13
Last modified: 2026-06-17

Description

Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes. This results in a segmentation fault for the application using libpq. Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected.

Frequently asked questions

What is CVE-2025-12818?: Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes. This results in a segmentation fault for the application using libpq. Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected.
How severe is CVE-2025-12818?: CVE-2025-12818 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-12818 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-12818?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-12818 have an EU (EUVD) identifier?: Yes. CVE-2025-12818 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-169291.
When was CVE-2025-12818 published?: CVE-2025-12818 was published on 2025-11-13 and last updated on 2026-06-17.

References

https://www.postgresql.org/support/security/CVE-2025-12818/

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