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Fencer Vulns
high 8.1

CVE-2026-3172 json

pgvector buffer overflow in parallel HNSW index build

published 2026-02-25 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-8743

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

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.

Patch / fix

  • n/a pgvector 0.8.2
  • pgvector Debian 14 0.8.2-1

debian advisories DEBIAN-CVE-2026-3172

  • pgvector SLES for SAP applications 16.0, SLES 16.0 0.8.2-160000.1.1
  • postgresql13-pgvector SLES for SAP applications 16.0, SLES 16.0 0.8.2-160000.1.1
  • postgresql14-pgvector SLES for SAP applications 16.0, SLES 16.0 0.8.2-160000.1.1
  • postgresql15-pgvector SLES for SAP applications 16.0, SLES 16.0 0.8.2-160000.1.1
  • postgresql16-pgvector SLES for SAP applications 16.0, SLES 16.0 0.8.2-160000.1.1
  • postgresql17-pgvector SLES for SAP applications 16.0, SLES 16.0 0.8.2-160000.1.1
  • postgresql18-pgvector SLES for SAP applications 16.0, SLES 16.0 0.8.2-160000.1.1
  • pgvector SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Server Applications 15 SP7 +1 more 0.8.2-150600.13.9.1

suse advisories SUSE-SU-2026:21153-1SUSE-SU-2026:1068-1

  • pgvector openSUSE Leap 16.0 0.8.2-160000.1.1
  • postgresql13-pgvector openSUSE Leap 16.0 0.8.2-160000.1.1
  • postgresql14-pgvector openSUSE Leap 16.0 0.8.2-160000.1.1
  • postgresql15-pgvector openSUSE Leap 16.0 0.8.2-160000.1.1
  • postgresql16-pgvector openSUSE Leap 16.0 0.8.2-160000.1.1
  • postgresql17-pgvector openSUSE Leap 16.0 0.8.2-160000.1.1
  • postgresql18-pgvector openSUSE Leap 16.0 0.8.2-160000.1.1
  • pgvector openSUSE Tumbleweed 0.8.2-1.1

opensuse advisories openSUSE-SU-2026:20489-1openSUSE-SU-2026:10409-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-3172 updated cvss 6.8

pgvector: pgvector: Information disclosure or denial of service via buffer overflow in parallel HNSW index build

  • Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-ocp-rag-rhel9 Red Hat Trusted Profile Analyzer rhtpa/rhtpa-trustification-service-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 pgvector Red Hat Enterprise Linux 10 postgresql16-pgvector, postgresql18-pgvector
    under investigation

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
8 mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

  • n/a pgvector

Classification

Weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound)
  • CWE-787 Out-of-bounds Write

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.