CVE-2026-14677

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-13. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 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: 1%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

Integer wraparound in PostgreSQL 32-bit builds of pltcl and plperl allows an object creator to cause the server to undersize an allocation and write out-of-bounds via crafted function bodies. This may execute arbitrary code as the operating system user running the database. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

CVSS v3
8.8
EG Score
8.8(high)
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%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 19, 2026

Advisory Details (1)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

PostgreSQL: CVE-2026-14677: PostgreSQL 32-bit pltcl and plperl undersize allocations, via integer wraparound

https://www.postgresql.org/support/security/CVE-2026-14677/

Vendor Advisories for CVE-2026-14677(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupostgresql-server-dev-18 (18.6-0ubuntu0.26.04.1) @ resolute2026-08-21ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 29× in last 7d / 39× 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.

  1. 2026-08-21 04:34 UTCEG score recompute
  2. 2026-08-21 04:34 UTCVendor advisory
  3. 2026-08-21 04:34 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 15:46 UTCVendor advisory
  6. 2026-08-20 15:46 UTCGHSA enrichment
  7. 2026-08-20 02:56 UTCEG score recompute
  8. 2026-08-20 02:56 UTCGHSA enrichment
  9. 2026-08-19 17:03 UTCEPSS rescore
  10. 2026-08-19 14:08 UTCGHSA enrichment
  11. 2026-08-19 01:20 UTCGHSA enrichment
  12. 2026-08-18 15:33 UTCEG score recompute
  13. 2026-08-18 15:33 UTCGHSA enrichment
  14. 2026-08-18 13:48 UTCEPSS rescore
  15. 2026-08-18 11:48 UTCGHSA enrichment
  16. 2026-08-17 23:00 UTCEG score recompute
  17. 2026-08-17 23:00 UTCGHSA enrichment
  18. 2026-08-17 10:11 UTCGHSA enrichment
  19. 2026-08-16 21:24 UTCEG score recompute
  20. 2026-08-16 21:24 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 08:36 UTCEG score recompute
  23. 2026-08-16 08:36 UTCGHSA enrichment
  24. 2026-08-16 02:14 UTCEPSS rescore
  25. 2026-08-15 19:48 UTCGHSA enrichment
Show 14 more
  1. 2026-08-15 07:00 UTCEG score recompute
  2. 2026-08-15 07:00 UTCGHSA enrichment
  3. 2026-08-15 01:30 UTCEPSS rescore
  4. 2026-08-14 18:12 UTCGHSA enrichment
  5. 2026-08-14 05:25 UTCEG score recompute
  6. 2026-08-14 05:25 UTCGHSA enrichment
  7. 2026-08-14 04:24 UTCEG score recompute
  8. 2026-08-14 04:24 UTCGHSA enrichment
  9. 2026-08-13 16:29 UTCEG score recompute
  10. 2026-08-13 16:29 UTCGHSA enrichment
  11. 2026-08-13 16:02 UTCEG score recompute
  12. 2026-08-13 16:02 UTCGHSA enrichment
  13. 2026-08-13 13:17 UTCEG score recompute
  14. 2026-08-13 13:16 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-14677?
CVE-2026-14677 is a high vulnerability published on August 13, 2026. Integer wraparound in PostgreSQL 32-bit builds of pltcl and plperl allows an object creator to cause the server to undersize an allocation and write out-of-bounds via crafted function bodies. This may execute arbitrary code as the operating system user running the database. CVE-2026-6473 had fixed…
When was CVE-2026-14677 disclosed?
CVE-2026-14677 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-14677 actively exploited?
CVE-2026-14677 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.7% of all scored CVEs.
What is the CVSS score of CVE-2026-14677?
CVE-2026-14677 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-14677?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14677, 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

Explore the affected products and dependency analysis for CVE-2026-14677

Explore →

Is Your Infrastructure Affected by CVE-2026-14677?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs