CVE-2026-40469

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM 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 — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

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(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Aug 30, 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(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntugawk (1:4.1.3+dfsg-0.1ubuntu0.1~esm2) @ xenial2026-08-30ubuntu
redhatgawk-main-5.4.1-1.hum12026-08-03redhat
redhatgawk-main-5.4.0-3.1.hum12026-07-15redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
gawk1:5.1.0-1, 1:5.2.1-1, 1:5.2.1-2, 1:5.3.2-1——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
gawk1:5.2.1-2, 1:5.3.2-1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
gawk1:5.2.1-2, 1:5.3.2-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
gawk1:5.2.1-2, 1:5.3.2-1——

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 53× in last 7d / 347× 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 449 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 72.0% of all scored CVEs.
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.

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