pgvector buffer overflow in parallel HNSW index build
Priority LOW 35CWE-191Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00385 32nd percentileScored 2026-11-07
Fix Partial pgvector: 0.8.2Red Hat: 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | pgvector | 0.8.0 to before 0.8.2; 0.7.0; 0.6.0 | 0.8.2 | Patch available | CNA |
- pgvector Vendor— Affected 0.8.0 to before 0.8.2; 0.7.0; 0.6.0 Fixed in 0.8.2 Patch available CNA
Remediation
- Fix · CNA pgvector Fixed in 0.8.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Lightspeed | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | — |
| Red Hat Enterprise Linux 9 | Affected | — |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3172
- 2026-10-03 Alias added: GHSA-789c-mgqf-5hwx
- 2026-10-23 EPSS moved to the 50th–90th percentile
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Sources
- CVE-2026-3172 · CVE Program
- CVE-2026-3172 · NVD
- FIRST EPSS
- GHSA-789c-mgqf-5hwx · GitHub Advisory Database · CC BY 4.0
- CVE-2026-3172 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences