CVE-2026-3172

HIGHNVD 8.18.1—

8.1

Buffer overflow in parallel HNSW index build in pgvector 0.6.0 through 0.8.1 allows a database user to leak sensitive data from other relations or crash the database server.

CVSS v3: 8.1
EG Score: 8.1(medium)
EPSS: 19.9%
KEV: Not listed

Published

February 25, 2026

Last Modified

April 15, 2026

References (1)

f86ef6dc-4d3a-42ad-8f28-e6d5547a5007https://github.com/pgvector/pgvector/issues/959

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
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2026-05-31 00:16 UTCepss_batch
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2026-05-27 13:40 UTCepss_batch
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2026-05-20 22:38 UTCepss_batch
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2026-05-20 22:08 UTCEG score recompute
2026-05-20 22:08 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-3172?

CVE-2026-3172 is a high vulnerability published on February 25, 2026. Buffer overflow in parallel HNSW index build in pgvector 0.6.0 through 0.8.1 allows a database user to leak sensitive data from other relations or crash the database server.

When was CVE-2026-3172 disclosed?

CVE-2026-3172 was first published in the National Vulnerability Database on February 25, 2026, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-3172 actively exploited?

CVE-2026-3172 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-3172?

CVE-2026-3172 has a CVSS v3 base score of 8.1 (NVD).

How do I remediate CVE-2026-3172?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3172, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-3172

📅 Published

🔄 Last Modified

🔗 References (1)