CVE-2026-16241

LOWPre-NVD 3.83.8—
EchelonGraph scoreMEDIUM confidence

Score 3.8 from GitHub Security Advisory (severity: LOW) published 2026-08-13. a secondary CVSS source baseline 3.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
3.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.8Exploit: None knownExposed: 0

A fix is available — apply it.

Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service against the ECPG client via sending a bytea value lacking the mandatory prefix. The client overwrites a huge memory region with bytes outside attacker knowledge or control. This typically yields a simple SIGSEGV, but rare cases might achieve client-specific integrity impact via the write. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

CVSS v3
3.8
EG Score
3.8(medium)
EG Risk
17(Track)
EG Risk 17/100SSVC: 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
Severity38% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 29, 2026

References (1)

Vendor Advisories for CVE-2026-16241(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) @ resolute2026-09-18ubuntu

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 rangeFixed inDependents
postgresql16—16.15-r0—
postgresql17—17.11-r0—
Alpine:v3.22(2)
PackageVulnerable rangeFixed inDependents
postgresql16—16.15-r0—
postgresql17—17.11-r0—
Alpine:v3.23(2)
PackageVulnerable rangeFixed inDependents
postgresql17—17.11-r0—
postgresql18—18.5-r0—
Alpine:v3.24(2)
PackageVulnerable rangeFixed inDependents
postgresql17—17.11-r0—
postgresql18—18.5-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
postgresql-1515.10-0+deb12u1 ... 15.9-0+deb12u1 (21 versions)15.19-0+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
postgresql-1717.10-0+deb13u1 ... 17.9-0+deb13u1 (7 versions)17.11-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
postgresql-1818.0-1 ... 18~~devel.20250502-1 (20 versions)18.6-1—

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 10× in last 7d / 54× 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. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 18:19 UTCEG score recompute
  3. 2026-09-18 18:19 UTCVendor advisory
  4. 2026-09-18 18:19 UTCGHSA enrichment
  5. 2026-09-16 14:07 UTCEPSS rescore
  6. 2026-09-16 05:14 UTCEPSS rescore
  7. 2026-09-15 13:54 UTCEG score recompute
  8. 2026-09-15 13:54 UTCVendor advisory
  9. 2026-09-15 13:54 UTCGHSA enrichment
  10. 2026-09-13 16:46 UTCEPSS rescore
  11. 2026-09-12 15:00 UTCEPSS rescore
  12. 2026-09-12 09:29 UTCEG score recompute
  13. 2026-09-12 09:29 UTCVendor advisory
  14. 2026-09-12 09:29 UTCGHSA enrichment
  15. 2026-09-11 14:52 UTCEPSS rescore
  16. 2026-09-11 09:36 UTCEPSS rescore
  17. 2026-09-10 09:34 UTCEPSS rescore
  18. 2026-09-09 05:03 UTCEG score recompute
  19. 2026-09-09 05:03 UTCVendor advisory
  20. 2026-09-09 05:03 UTCGHSA enrichment
  21. 2026-09-08 22:00 UTCEPSS rescore
  22. 2026-09-07 16:01 UTCEPSS rescore
  23. 2026-09-06 13:47 UTCEPSS rescore
  24. 2026-09-05 09:39 UTCEG score recompute
  25. 2026-09-05 09:39 UTCVendor advisory
Show 47 more
  1. 2026-09-05 09:39 UTCGHSA enrichment
  2. 2026-09-04 05:06 UTCEPSS rescore
  3. 2026-09-02 14:11 UTCEPSS rescore
  4. 2026-09-02 05:14 UTCEG score recompute
  5. 2026-09-02 05:14 UTCGHSA enrichment
  6. 2026-09-01 13:53 UTCEPSS rescore
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 01:22 UTCEPSS rescore
  9. 2026-08-29 23:26 UTCEG score recompute
  10. 2026-08-29 23:26 UTCVendor advisory
  11. 2026-08-29 23:26 UTCGHSA enrichment
  12. 2026-08-29 23:14 UTCEG score recompute
  13. 2026-08-29 23:14 UTCVendor advisory
  14. 2026-08-29 23:14 UTCGHSA enrichment
  15. 2026-08-29 08:15 UTCEG score recompute
  16. 2026-08-29 08:15 UTCVendor advisory
  17. 2026-08-29 08:15 UTCGHSA enrichment
  18. 2026-08-28 21:41 UTCEPSS rescore
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 14:46 UTCEPSS rescore
  21. 2026-08-25 23:54 UTCEG score recompute
  22. 2026-08-25 23:54 UTCVendor advisory
  23. 2026-08-25 23:54 UTCGHSA enrichment
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 19:29 UTCEG score recompute
  26. 2026-08-22 19:29 UTCVendor advisory
  27. 2026-08-22 19:29 UTCGHSA enrichment
  28. 2026-08-21 23:49 UTCEPSS rescore
  29. 2026-08-20 22:55 UTCEPSS rescore
  30. 2026-08-19 17:03 UTCEPSS rescore
  31. 2026-08-19 15:04 UTCGHSA enrichment
  32. 2026-08-18 15:33 UTCEG score recompute
  33. 2026-08-18 15:33 UTCGHSA enrichment
  34. 2026-08-18 13:48 UTCEPSS rescore
  35. 2026-08-17 13:47 UTCEPSS rescore
  36. 2026-08-16 20:55 UTCEG score recompute
  37. 2026-08-16 20:55 UTCGHSA enrichment
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 02:14 UTCEPSS rescore
  40. 2026-08-15 01:30 UTCEPSS rescore
  41. 2026-08-13 16:29 UTCEG score recompute
  42. 2026-08-13 16:29 UTCGHSA enrichment
  43. 2026-08-13 16:01 UTCEG score recompute
  44. 2026-08-13 16:01 UTCGHSA enrichment
  45. 2026-08-13 13:35 UTCEG score recompute
  46. 2026-08-13 13:17 UTCEG score recompute
  47. 2026-08-13 13:16 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16241?
CVE-2026-16241 is a low vulnerability published on August 13, 2026. Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service against the ECPG client via sending a bytea value lacking the mandatory prefix. The client overwrites a huge memory region with bytes outside attacker knowledge or control. This…
When was CVE-2026-16241 disclosed?
CVE-2026-16241 was first published in the National Vulnerability Database 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-2026-16241 actively exploited?
CVE-2026-16241 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 90.1% of all scored CVEs.
What is the CVSS score of CVE-2026-16241?
CVE-2026-16241 has a CVSS v3 base score of 3.8 (NVD).
How do I remediate CVE-2026-16241?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16241, 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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