CVE-2026-18022

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-29. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Integer wraparound in IVFFlat index build in pgvector before 0.8.6 allows a database user to write data out-of-bounds, which could lead to arbitrary code execution. Only 32-bit systems are affected.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

July 29, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Jul 29, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 636a92a3395d (pgvector/pgvector)

Fix landed in pgvector/pgvector commit 636a92a3395d — awaiting tagged release

https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104
generic

Buffer overflow with IVFFlat index build on 32-bit systems · Issue #1006 · pgvector/pgvector · GitHub

https://github.com/pgvector/pgvector/issues/1006

Vendor Advisories for CVE-2026-18022(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pgvector0.8.0-1 ... 0.8.6-1 (8 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pgvector0.8.0-1 ... 0.8.6-1 (8 versions)——

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 91× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 167 total refreshes for this CVE.

  1. 2026-09-15 07:49 UTCEG score recompute
  2. 2026-09-15 07:49 UTCGHSA enrichment
  3. 2026-09-14 16:21 UTCGHSA enrichment
  4. 2026-09-14 03:22 UTCEG score recompute
  5. 2026-09-14 03:22 UTCGHSA enrichment
  6. 2026-09-13 16:46 UTCEPSS rescore
  7. 2026-09-13 14:24 UTCGHSA enrichment
  8. 2026-09-13 01:26 UTCEG score recompute
  9. 2026-09-13 01:26 UTCGHSA enrichment
  10. 2026-09-12 15:00 UTCEPSS rescore
  11. 2026-09-12 12:28 UTCGHSA enrichment
  12. 2026-09-11 21:45 UTCEG score recompute
  13. 2026-09-11 21:45 UTCGHSA enrichment
  14. 2026-09-11 09:36 UTCEPSS rescore
  15. 2026-09-11 08:47 UTCGHSA enrichment
  16. 2026-09-10 19:49 UTCEG score recompute
  17. 2026-09-10 19:49 UTCGHSA enrichment
  18. 2026-09-10 09:34 UTCEPSS rescore
  19. 2026-09-10 04:30 UTCGHSA enrichment
  20. 2026-09-09 07:46 UTCEG score recompute
  21. 2026-09-09 07:46 UTCGHSA enrichment
  22. 2026-09-08 22:00 UTCEPSS rescore
  23. 2026-09-07 20:45 UTCEG score recompute
  24. 2026-09-07 20:45 UTCGHSA enrichment
  25. 2026-09-07 16:01 UTCEPSS rescore
Show 75 more
  1. 2026-09-06 22:31 UTCEG score recompute
  2. 2026-09-06 22:31 UTCGHSA enrichment
  3. 2026-09-06 13:47 UTCEPSS rescore
  4. 2026-09-06 08:01 UTCGHSA enrichment
  5. 2026-09-05 19:04 UTCEG score recompute
  6. 2026-09-05 19:04 UTCGHSA enrichment
  7. 2026-09-05 05:10 UTCEG score recompute
  8. 2026-09-05 05:10 UTCGHSA enrichment
  9. 2026-09-04 11:54 UTCEG score recompute
  10. 2026-09-04 11:54 UTCGHSA enrichment
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:11 UTCEPSS rescore
  13. 2026-09-01 22:46 UTCEG score recompute
  14. 2026-09-01 22:46 UTCGHSA enrichment
  15. 2026-09-01 13:53 UTCEPSS rescore
  16. 2026-09-01 04:39 UTCEPSS rescore
  17. 2026-08-31 23:54 UTCGHSA enrichment
  18. 2026-08-31 01:08 UTCEG score recompute
  19. 2026-08-31 01:08 UTCGHSA enrichment
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 12:10 UTCEG score recompute
  22. 2026-08-30 12:10 UTCGHSA enrichment
  23. 2026-08-30 01:22 UTCEPSS rescore
  24. 2026-08-29 23:12 UTCEG score recompute
  25. 2026-08-29 23:11 UTCGHSA enrichment
  26. 2026-08-28 21:41 UTCEPSS rescore
  27. 2026-08-28 03:42 UTCGHSA enrichment
  28. 2026-08-27 14:44 UTCEG score recompute
  29. 2026-08-27 14:44 UTCGHSA enrichment
  30. 2026-08-27 14:25 UTCEPSS rescore
  31. 2026-08-27 01:39 UTCEG score recompute
  32. 2026-08-27 01:39 UTCGHSA enrichment
  33. 2026-08-26 14:46 UTCEPSS rescore
  34. 2026-08-26 12:42 UTCGHSA enrichment
  35. 2026-08-25 23:44 UTCEG score recompute
  36. 2026-08-25 23:44 UTCGHSA enrichment
  37. 2026-08-25 13:48 UTCEPSS rescore
  38. 2026-08-25 10:46 UTCGHSA enrichment
  39. 2026-08-24 21:48 UTCEG score recompute
  40. 2026-08-24 21:48 UTCGHSA enrichment
  41. 2026-08-24 08:50 UTCGHSA enrichment
  42. 2026-08-23 19:48 UTCGHSA enrichment
  43. 2026-08-23 06:51 UTCEG score recompute
  44. 2026-08-23 06:51 UTCGHSA enrichment
  45. 2026-08-23 00:19 UTCEPSS rescore
  46. 2026-08-22 17:53 UTCGHSA enrichment
  47. 2026-08-22 04:55 UTCEG score recompute
  48. 2026-08-22 04:55 UTCGHSA enrichment
  49. 2026-08-21 23:49 UTCEPSS rescore
  50. 2026-08-21 15:57 UTCGHSA enrichment
  51. 2026-08-21 02:56 UTCEG score recompute
  52. 2026-08-21 02:56 UTCGHSA enrichment
  53. 2026-08-20 22:55 UTCEPSS rescore
  54. 2026-08-20 13:57 UTCGHSA enrichment
  55. 2026-08-20 09:28 UTCGHSA enrichment
  56. 2026-08-19 20:31 UTCEG score recompute
  57. 2026-08-19 20:31 UTCGHSA enrichment
  58. 2026-08-19 17:03 UTCEPSS rescore
  59. 2026-08-19 07:33 UTCGHSA enrichment
  60. 2026-08-18 18:34 UTCEG score recompute
  61. 2026-08-18 18:34 UTCGHSA enrichment
  62. 2026-08-18 13:48 UTCEPSS rescore
  63. 2026-08-18 01:05 UTCEG score recompute
  64. 2026-08-18 01:05 UTCGHSA enrichment
  65. 2026-08-17 13:47 UTCEPSS rescore
  66. 2026-08-17 11:34 UTCGHSA enrichment
  67. 2026-08-16 22:37 UTCEG score recompute
  68. 2026-08-16 22:37 UTCGHSA enrichment
  69. 2026-08-16 14:56 UTCEPSS rescore
  70. 2026-08-16 09:39 UTCEG score recompute
  71. 2026-08-16 09:39 UTCGHSA enrichment
  72. 2026-08-16 02:14 UTCEPSS rescore
  73. 2026-08-15 20:42 UTCGHSA enrichment
  74. 2026-08-15 07:44 UTCEG score recompute
  75. 2026-08-15 07:44 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-18022?
CVE-2026-18022 is a high vulnerability published on July 29, 2026. Integer wraparound in IVFFlat index build in pgvector before 0.8.6 allows a database user to write data out-of-bounds, which could lead to arbitrary code execution. Only 32-bit systems are affected.
When was CVE-2026-18022 disclosed?
CVE-2026-18022 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18022 actively exploited?
CVE-2026-18022 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.5% of all scored CVEs.
What is the CVSS score of CVE-2026-18022?
CVE-2026-18022 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-18022?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18022, 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.

Dependency Blast Radius

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