CVE-2026-42603

HIGHNVD 8.88.8
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.5% (38th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.8Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

OWASP BLT is a QA testing and vulnerability disclosure platform that encompasses websites, apps, git repositories, and more. Prior to 2.1.2, .github/workflows/pre-commit-fix.yaml uses pull_request_target (privileged trigger) but checks out and executes code directly from the attacker's fork, enabling RCE with write permissions. This vulnerability is fixed in 2.1.2.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100

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)
Severity88% × 45%
The EG Score, 8.8 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
38th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 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 total (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

May 11, 2026

Last Modified

May 13, 2026

Advisory Details (1)

Auto-updated May 11, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

[RCE] pre-commit-fix.yaml executes untrusted fork code via pull_request_target · Advisory · OWASP-BLT/BLT · GitHub

https://github.com/OWASP-BLT/BLT/security/advisories/GHSA-cgvj-qg2h-cqfh

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 26× 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 172 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 73 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  6. 2026-10-12 16:07 UTCEG score recompute
  7. 2026-10-11 19:49 UTCEG score recompute
  8. 2026-10-11 17:03 UTCEG score recompute
  9. 2026-10-11 14:29 UTCEG score recompute
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  23. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 16th percentile
Show 74 more
  1. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  2. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  3. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  4. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  5. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  6. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  7. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  8. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  9. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  12. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  13. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  17. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  18. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  19. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  20. 2026-08-23 18:39 UTCEG score recompute
  21. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  22. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  23. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  24. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  25. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  26. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  27. 2026-08-17 11:11 UTCEG score recompute
  28. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  29. 2026-08-16 04:26 UTCEG score recompute
  30. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  31. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  32. 2026-08-14 02:58 UTCEG score recompute
  33. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  34. 2026-08-12 16:31 UTCEG score recompute
  35. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  36. 2026-08-11 15:47 UTCEG score recompute
  37. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  38. 2026-08-11 01:11 UTCEG score recompute
  39. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  40. 2026-08-09 14:57 UTCEG score recompute
  41. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  42. 2026-08-09 02:15 UTCEG score recompute
  43. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  44. 2026-08-08 03:02 UTCEG score recompute
  45. 2026-08-07 01:38 UTCEG score recompute
  46. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  47. 2026-08-05 21:58 UTCEG score recompute
  48. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  49. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  50. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  51. 2026-08-03 19:26 UTCEG score recompute
  52. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  53. 2026-08-02 14:51 UTCEG score recompute
  54. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  55. 2026-08-02 02:09 UTCEG score recompute
  56. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  57. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  58. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  59. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  60. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  61. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  62. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  63. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  64. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  65. 2026-07-23 03:11 UTCEG score recompute
  66. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  67. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  68. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  69. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  70. 2026-07-19 02:29 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  71. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  72. 2026-07-16 17:03 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  73. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  74. 2026-07-15 02:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile

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Frequently asked(5)

What is CVE-2026-42603?
CVE-2026-42603 is a high-severity vulnerability; its CVE record was published on May 11, 2026. OWASP BLT is a QA testing and vulnerability disclosure platform that encompasses websites, apps, git repositories, and more. Prior to 2.1.2, .github/workflows/pre-commit-fix.yaml uses pullrequesttarget (privileged trigger) but checks out and executes code directly from the attacker's fork, enabling…
When was the CVE record for CVE-2026-42603 published?
The CVE record for CVE-2026-42603 was published on May 11, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 13, 2026; the record at its source may have been updated since.
Is CVE-2026-42603 actively exploited?
CVE-2026-42603 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42603?
CVE-2026-42603 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-42603?
The CVE record for CVE-2026-42603 names the fix: "This vulnerability is fixed in 2.1.2."

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