CVE-2026-40469

CRITICALNVD 9.19.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 9.1Exploit: None knownExposed services: Not assessed

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
9.1CRITICALmedium confidence
EG Risk
41
EG Risk 41/100

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 (value × EchelonGraph’s weight)
Severity91% × 45%
The EG Score, 9.1 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 13, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
Patch available.
Web page

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

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

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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntugawk (1:4.1.4+dfsg-1ubuntu0.1~esm2) @ bionic2026-10-12ubuntu
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 rangeFix by version rangeDependents
gawk1:5.1.0-1, 1:5.2.1-1, 1:5.2.1-2, 1:5.3.2-1
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gawk1:5.2.1-2, 1:5.3.2-1
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gawk1:5.2.1-2, 1:5.3.2-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gawk1:5.2.1-2, 1:5.3.2-1
  • every version on: no fix on record
—

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 19× in last 7d / 53× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 554 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 455 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 02:13 UTCEG score recompute
  2. 2026-10-14 02:13 UTCVendor advisory
  3. 2026-10-14 02:13 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-12 22:32 UTCEG score recompute
  6. 2026-10-12 22:32 UTCVendor advisory
  7. 2026-10-12 22:32 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  8. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-12 16:09 UTCEG score recompute
  10. 2026-10-12 08:06 UTCVendor advisory
  11. 2026-10-12 08:05 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  12. 2026-10-11 19:51 UTCEG score recompute
  13. 2026-10-11 17:05 UTCEG score recompute
  14. 2026-10-11 14:31 UTCEG score recompute
  15. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  20. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  23. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  25. 2026-10-01 14:17 UTCEG score recompute
Show 74 more
  1. 2026-10-01 14:17 UTCVendor advisory
  2. 2026-10-01 14:17 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  3. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  4. 2026-09-28 09:31 UTCEG score recompute
  5. 2026-09-28 09:31 UTCVendor advisory
  6. 2026-09-28 09:31 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  7. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  8. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  9. 2026-09-24 10:06 UTCEG score recompute
  10. 2026-09-24 10:06 UTCVendor advisory
  11. 2026-09-24 10:06 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  12. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  13. 2026-09-23 09:41 UTCVendor advisory
  14. 2026-09-23 09:41 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  15. 2026-09-23 05:25 UTCEG score recompute
  16. 2026-09-23 05:25 UTCVendor advisory
  17. 2026-09-23 05:25 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  18. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-09-18 10:06 UTCVendor advisory
  21. 2026-09-18 10:06 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  22. 2026-09-18 05:02 UTCEG score recompute
  23. 2026-09-18 05:02 UTCVendor advisory
  24. 2026-09-18 05:02 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  25. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  26. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  27. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  28. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  29. 2026-09-14 08:05 UTCVendor advisory
  30. 2026-09-14 08:05 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  31. 2026-09-14 03:48 UTCVendor advisory
  32. 2026-09-14 03:48 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  33. 2026-09-13 23:32 UTCEG score recompute
  34. 2026-09-13 23:32 UTCVendor advisory
  35. 2026-09-13 23:32 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  36. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  37. 2026-09-13 16:39 UTCVendor advisory
  38. 2026-09-13 16:39 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  39. 2026-09-13 12:16 UTCVendor advisory
  40. 2026-09-13 12:16 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  41. 2026-09-13 08:00 UTCEG score recompute
  42. 2026-09-13 08:00 UTCVendor advisory
  43. 2026-09-13 08:00 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  44. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  45. 2026-09-12 13:27 UTCVendor advisory
  46. 2026-09-12 13:27 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  47. 2026-09-12 01:52 UTCEG score recompute
  48. 2026-09-12 01:52 UTCVendor advisory
  49. 2026-09-12 01:52 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  50. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  51. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  52. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  53. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  54. 2026-09-08 01:57 UTCEG score recompute
  55. 2026-09-08 01:57 UTCVendor advisory
  56. 2026-09-08 01:57 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  57. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  58. 2026-09-06 13:50 UTCEG score recompute
  59. 2026-09-06 13:50 UTCVendor advisory
  60. 2026-09-06 13:50 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  61. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  62. 2026-09-06 01:45 UTCVendor advisory
  63. 2026-09-06 01:45 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  64. 2026-09-05 21:25 UTCEG score recompute
  65. 2026-09-05 21:25 UTCVendor advisory
  66. 2026-09-05 21:25 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  67. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  68. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  69. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  70. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  71. 2026-08-31 00:59 UTCVendor advisory
  72. 2026-08-31 00:59 UTCGHSA enrichmentGHSA-5x2x-26c9-4q5x · GitHub CVSS 9.1
  73. 2026-08-30 20:43 UTCEG score recompute
  74. 2026-08-30 20:43 UTCVendor advisory

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Frequently asked(5)

What is CVE-2026-40469?
CVE-2026-40469 is a critical-severity vulnerability; its CVE record was 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 made public?
CVE-2026-40469 was made public on July 13, 2026: that is the date its CVE record's CNA, CERT.PL, gives for when the vulnerability was made public. The CVE record itself was published on July 13, 2026. EchelonGraph's copy of the record carries a last-modified date of July 14, 2026; the record at its source may have been updated since.
Is CVE-2026-40469 actively exploited?
CVE-2026-40469 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-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?
A fix for CVE-2026-40469 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-40469 are linked in the Vendor Advisories panel on this page.

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