CVE-2026-41242

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 48% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

protobufjs compiles protobuf definitions into JavaScript (JS) functions. In versions prior to 8.0.1 and 7.5.5, attackers can inject arbitrary code in the "type" fields of protobuf definitions, which will then execute during object decoding using that definition. Versions 8.0.1 and 7.5.5 patch the issue.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

April 18, 2026

Last Modified

September 1, 2026

Advisory Details (11)

Auto-updated Sep 1, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

protobufjs: v8.0.1

Patch available: protobufjs/protobuf.js protobufjs-v8.0.1

https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.0.1
github_release Patch Available

v7.5.5

Patch available: protobufjs/protobuf.js protobufjs-v7.5.5

https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.5.5
github_commit Patch Available

commit ff7b2afef875 (protobufjs/protobuf.js)

Patch available: protobufjs/protobuf.js protobufjs-cli-v1.3.2 (contains commit ff7b2afef875)

https://github.com/protobufjs/protobuf.js/commit/ff7b2afef8754837cc6dc64c864cd111ab477956
github_commit Patch Available

commit 535df444ac06 (protobufjs/protobuf.js)

Patch available: protobufjs/protobuf.js protobufjs-cli-v2.5.1 (contains commit 535df444ac06)

https://github.com/protobufjs/protobuf.js/commit/535df444ac060243722ac5d672db205e5c531d75
github Patch Available

Code execution through attacker-controlled protobuf definitions · Advisory · protobufjs/protobuf.js · GitHub

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-xq3m-2v4x-88gg
redhat Patch Available

CVE-2026-41242 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-41242
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:37275
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:26234
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:24977
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:21338
redhat

2459442 – (CVE-2026-41242) CVE-2026-41242 protobufjs: protobufjs: Arbitrary code execution via injected protobuf definition type fields

https://bugzilla.redhat.com/show_bug.cgi?id=2459442

Vendor Advisories for CVE-2026-41242(4)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhoai/odh-mod-arch-maas-rhel9:17830826802026-07-09redhat
redhatrhdh/rhdh-hub-rhel9:17811873422026-06-16redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17804671472026-06-10redhat
redhatrhdh/rhdh-hub-rhel9:17798415862026-05-27redhat

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

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
protobufjs—7.5.5—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 90× 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 238 total refreshes for this CVE.

  1. 2026-09-01 13:53 UTCEPSS rescore
  2. 2026-09-01 12:22 UTCEG score recompute
  3. 2026-09-01 12:22 UTCVendor advisory
  4. 2026-09-01 04:39 UTCEPSS rescore
  5. 2026-08-30 19:17 UTCEPSS rescore
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-28 21:41 UTCEPSS rescore
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 16:12 UTCEG score recompute
  10. 2026-08-26 16:12 UTCVendor advisory
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-26 12:23 UTCEG score recompute
  13. 2026-08-26 12:23 UTCVendor advisory
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-23 00:19 UTCEPSS rescore
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-20 22:55 UTCEPSS rescore
  18. 2026-08-19 17:03 UTCEPSS rescore
  19. 2026-08-18 13:48 UTCEPSS rescore
  20. 2026-08-18 12:21 UTCEG score recompute
  21. 2026-08-18 12:21 UTCVendor advisory
  22. 2026-08-17 13:47 UTCEPSS rescore
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 10:37 UTCVendor advisory
  25. 2026-08-16 06:27 UTCEG score recompute
Show 75 more
  1. 2026-08-16 06:27 UTCVendor advisory
  2. 2026-08-16 02:14 UTCEPSS rescore
  3. 2026-08-15 02:29 UTCEG score recompute
  4. 2026-08-15 02:29 UTCVendor advisory
  5. 2026-08-15 01:30 UTCEPSS rescore
  6. 2026-08-14 22:20 UTCVendor advisory
  7. 2026-08-14 18:06 UTCVendor advisory
  8. 2026-08-14 12:54 UTCVendor advisory
  9. 2026-08-14 08:45 UTCVendor advisory
  10. 2026-08-14 04:35 UTCEG score recompute
  11. 2026-08-14 04:35 UTCVendor advisory
  12. 2026-08-13 22:00 UTCEPSS rescore
  13. 2026-08-13 08:50 UTCVendor advisory
  14. 2026-08-13 03:05 UTCVendor advisory
  15. 2026-08-12 22:55 UTCVendor advisory
  16. 2026-08-12 18:46 UTCEG score recompute
  17. 2026-08-12 18:46 UTCVendor advisory
  18. 2026-08-12 13:51 UTCEPSS rescore
  19. 2026-08-12 01:16 UTCVendor advisory
  20. 2026-08-11 21:07 UTCVendor advisory
  21. 2026-08-11 16:56 UTCEG score recompute
  22. 2026-08-11 16:56 UTCVendor advisory
  23. 2026-08-11 13:43 UTCEPSS rescore
  24. 2026-08-11 06:41 UTCVendor advisory
  25. 2026-08-11 02:32 UTCEG score recompute
  26. 2026-08-11 02:32 UTCVendor advisory
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 09:33 UTCVendor advisory
  29. 2026-08-10 05:23 UTCVendor advisory
  30. 2026-08-10 01:14 UTCVendor advisory
  31. 2026-08-09 21:04 UTCVendor advisory
  32. 2026-08-09 16:53 UTCEG score recompute
  33. 2026-08-09 16:53 UTCVendor advisory
  34. 2026-08-09 13:46 UTCEPSS rescore
  35. 2026-08-09 12:44 UTCVendor advisory
  36. 2026-08-09 08:00 UTCVendor advisory
  37. 2026-08-09 03:51 UTCEG score recompute
  38. 2026-08-09 03:51 UTCVendor advisory
  39. 2026-08-08 16:37 UTCEPSS rescore
  40. 2026-08-08 10:03 UTCVendor advisory
  41. 2026-08-08 05:53 UTCVendor advisory
  42. 2026-08-08 01:44 UTCVendor advisory
  43. 2026-08-07 21:34 UTCVendor advisory
  44. 2026-08-07 17:24 UTCEG score recompute
  45. 2026-08-07 17:24 UTCVendor advisory
  46. 2026-08-07 13:15 UTCVendor advisory
  47. 2026-08-06 17:27 UTCEG score recompute
  48. 2026-08-06 17:27 UTCVendor advisory
  49. 2026-08-06 13:46 UTCEPSS rescore
  50. 2026-08-06 11:58 UTCVendor advisory
  51. 2026-08-06 07:36 UTCVendor advisory
  52. 2026-08-06 03:26 UTCVendor advisory
  53. 2026-08-05 23:17 UTCEG score recompute
  54. 2026-08-05 23:17 UTCVendor advisory
  55. 2026-08-05 19:17 UTCEPSS rescore
  56. 2026-08-04 15:10 UTCEPSS rescore
  57. 2026-08-04 10:38 UTCEPSS rescore
  58. 2026-08-04 05:47 UTCVendor advisory
  59. 2026-08-04 01:38 UTCVendor advisory
  60. 2026-08-03 21:28 UTCEG score recompute
  61. 2026-08-03 21:28 UTCVendor advisory
  62. 2026-08-03 10:36 UTCEPSS rescore
  63. 2026-08-03 01:28 UTCVendor advisory
  64. 2026-08-02 21:18 UTCVendor advisory
  65. 2026-08-02 17:08 UTCVendor advisory
  66. 2026-08-02 12:58 UTCEG score recompute
  67. 2026-08-02 12:58 UTCVendor advisory
  68. 2026-08-02 02:27 UTCEPSS rescore
  69. 2026-08-01 04:16 UTCEPSS rescore
  70. 2026-07-30 16:28 UTCEPSS rescore
  71. 2026-07-30 01:30 UTCEPSS rescore
  72. 2026-07-28 15:36 UTCEPSS rescore
  73. 2026-07-27 14:13 UTCEPSS rescore
  74. 2026-07-26 14:54 UTCEPSS rescore
  75. 2026-07-26 14:54 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-41242?
CVE-2026-41242 is a critical vulnerability published on April 18, 2026. protobufjs compiles protobuf definitions into JavaScript (JS) functions. In versions prior to 8.0.1 and 7.5.5, attackers can inject arbitrary code in the "type" fields of protobuf definitions, which will then execute during object decoding using that definition. Versions 8.0.1 and 7.5.5 patch the…
When was CVE-2026-41242 disclosed?
CVE-2026-41242 was first published in the National Vulnerability Database on April 18, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41242 actively exploited?
CVE-2026-41242 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 47.7% of all scored CVEs.
What is the CVSS score of CVE-2026-41242?
CVE-2026-41242 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-41242?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41242, 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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