CVE-2026-40469

CRITICALNVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory published 2026-07-13. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

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

Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.

CVSS v3
9.1
EG Score
9.1(high)
EPSS
11.6%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 14, 2026

Advisory Details (2)

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

Merge branch 'gawk-5.4-stable' - gawk.git - gawk

https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=ae1b2d508f46913269a9e62aceda3636afe8147b
generic

Vulnerabilities in GNU gawk software | CERT Polska

https://cert.pl/en/posts/2026/07/CVE-2026-40467

Vendor Advisories for CVE-2026-40469(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 24× 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. 2026-07-16 00:28 UTCEG score recompute
  2. 2026-07-16 00:28 UTCGHSA enrichment
  3. 2026-07-15 20:12 UTCEG score recompute
  4. 2026-07-15 20:12 UTCGHSA enrichment
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 16:57 UTCEPSS rescore
  7. 2026-07-15 15:56 UTCEG score recompute
  8. 2026-07-15 15:56 UTCGHSA enrichment
  9. 2026-07-15 11:41 UTCEG score recompute
  10. 2026-07-15 11:41 UTCGHSA enrichment
  11. 2026-07-15 07:25 UTCEG score recompute
  12. 2026-07-15 07:25 UTCGHSA enrichment
  13. 2026-07-15 03:09 UTCEG score recompute
  14. 2026-07-15 03:09 UTCGHSA enrichment
  15. 2026-07-15 02:00 UTCEPSS rescore
  16. 2026-07-14 22:51 UTCEG score recompute
  17. 2026-07-14 22:51 UTCGHSA enrichment
  18. 2026-07-14 18:32 UTCEG score recompute
  19. 2026-07-14 18:32 UTCGHSA enrichment
  20. 2026-07-14 14:17 UTCEG score recompute▲ 4.00
  21. 2026-07-14 14:16 UTCGHSA enrichment
  22. 2026-07-14 01:44 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  23. 2026-07-13 12:53 UTCEG score recompute
  24. 2026-07-13 12:52 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40469?
CVE-2026-40469 is a critical vulnerability published on July 13, 2026. Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.
When was CVE-2026-40469 disclosed?
CVE-2026-40469 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40469 actively exploited?
CVE-2026-40469 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40469?
CVE-2026-40469 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-40469?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40469, 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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