CVE-2026-14677

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM 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: 0.4%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 13, 2026

Last Modified

August 29, 2026

Advisory Details (1)

Auto-updated Aug 13, 2026
Patch available.
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(20)

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

Patch Availability(25)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupostgresql-server-dev-18 (18.6-0ubuntu0.26.04.1) @ resolute2026-10-07ubuntu
redhatpostgresql:12-8040020260924163759.522a0ee42026-09-30redhat
redhatansible-automation-platform/bootc-automation-portal-rhel9:17906573742026-09-29redhat
redhatpostgresql-0:13.23-1.el9_6.52026-09-28redhat
redhatpostgresql-0:13.23-1.el9_2.52026-09-28redhat
redhatpostgresql16-0:16.15-1.el10_02026-09-28redhat
redhatpostgresql-0:13.23-1.el9_4.42026-09-28redhat
redhatpostgresql:12-8060020260923144955.ad008a3a2026-09-28redhat
redhatpostgresql:12-8080020260923144922.63b345852026-09-28redhat
redhatrhui5/rhua-rhel9:17902420042026-09-24redhat
redhatpostgresql:16-9040020260922062609.rhel92026-09-23redhat
redhatpostgresql:15-9040020260917091622.rhel92026-09-23redhat
redhatpostgresql:15-9020020260917092006.rhel92026-09-23redhat
redhatpostgresql:15-8080020260921162003.63b345852026-09-23redhat
redhatpostgresql:16-9060020260921091101.rhel92026-09-23redhat
redhatpostgresql:12-8100020260917081510.489197e62026-09-23redhat
redhatpostgresql:15-9080020260903073937.rhel92026-09-22redhat
redhatpostgresql:15-8100020260906175012.489197e62026-09-22redhat
redhatpostgresql:16-8100020260910192321.489197e62026-09-22redhat
redhatpostgresql16-0:16.15-1.el10_22026-09-22redhat
redhatpostgresql-0:13.23-6.el9_82026-09-22redhat
redhatpostgresql:15-9060020260917102335.rhel92026-09-21redhat
redhatpostgresql:18-9080020260914093252.rhel92026-09-16redhat
redhatpostgresql:16-9080020260907191505.rhel92026-09-15redhat
redhatpostgresql18-0:18.6-1.el10_22026-09-14redhat

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.

Affected Packages

(11 across 7 ecosystems)
Alpine:v3.21(2)
PackageVulnerable rangeFix by version rangeDependents
postgresql16—
  • every version up to 16.15-r0: fixed in 16.15-r0
—
postgresql17—
  • every version up to 17.11-r0: fixed in 17.11-r0
—
Alpine:v3.22(2)
PackageVulnerable rangeFix by version rangeDependents
postgresql16—
  • every version up to 16.15-r0: fixed in 16.15-r0
—
postgresql17—
  • every version up to 17.11-r0: fixed in 17.11-r0
—
Alpine:v3.23(2)
PackageVulnerable rangeFix by version rangeDependents
postgresql17—
  • every version up to 17.11-r0: fixed in 17.11-r0
—
postgresql18—
  • every version up to 18.5-r0: fixed in 18.5-r0
—
Alpine:v3.24(2)
PackageVulnerable rangeFix by version rangeDependents
postgresql17—
  • every version up to 17.11-r0: fixed in 17.11-r0
—
postgresql18—
  • every version up to 18.5-r0: fixed in 18.5-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
postgresql-1515.10-0+deb12u1 ... 15.9-0+deb12u1 (21 versions)
  • every version up to 15.19-0+deb12u1: fixed in 15.19-0+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
postgresql-1717.10-0+deb13u1 ... 17.9-0+deb13u1 (7 versions)
  • every version up to 17.11-0+deb13u1: fixed in 17.11-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
postgresql-1818.0-1 ... 18~~devel.20250502-1 (20 versions)
  • every version up to 18.6-1: fixed in 18.6-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 23× in last 7d / 128× 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 271 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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 on August 13, 2026, with the most recent update on August 29, 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 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-14677?
CVE-2026-14677 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-14677?
A fix for CVE-2026-14677 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-14677 are linked in the Vendor Advisories panel on this page.

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