CVE-2024-4367

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 73% probability of exploitation within the next 30 days (top 0.6% of all CVEs). NVD baseline CVSS 8.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Weaponized
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 73%
  • Public exploit code is available (ssvc poc, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 73%CVSS: 8.8Exploit: ssvc poc · epss top5pct · epss high · public exploitExposed: 0

A fix is available — apply it.

A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
70(Track*)
EG Risk 70/100SSVC: 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
Severity90% × 45%
Exploitation73% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
73%
EPSS %ILE
99%
KEV
Not listed

Published

May 14, 2024

Last Modified

May 12, 2026

Advisory Details (9)

Auto-updated May 12, 2026
🔬 Proof of concept available. Patch available.
generic🟡 PoC Available

Stored XSS in PDF renderer · Issue #7928 · gogs/gogs · GitHub

https://github.com/gogs/gogs/issues/7928
generic🟡 PoC Available

CVE-2024-4367 - Arbitrary JavaScript execution in PDF.js - Codean Labs

https://codeanlabs.com/blog/research/cve-2024-4367-arbitrary-js-execution-in-pdf-js/
generic

1893645 - (CVE-2024-4367) Arbitrary Javascript injection in PDF.js through FontMatrix

https://bugzilla.mozilla.org/show_bug.cgi?id=1893645
generic

Full Disclosure: OXAS-ADV-2024-0004: OX App Suite Security Advisory

http://seclists.org/fulldisclosure/2024/Aug/30
generic

Security Vulnerabilities fixed in Thunderbird 115.11 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-23/
generic

Security Vulnerabilities fixed in Firefox ESR 115.11 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-22/
generic

Security Vulnerabilities fixed in Firefox 126 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-21/
generic Patch Available

[SECURITY] [DLA 3817-1] thunderbird security update

https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html
generic Patch Available

[SECURITY] [DLA 3815-1] firefox-esr security update

https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html

Vendor Advisories for CVE-2024-4367(20)

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

Patch Availability(20)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxul-ext-lightning (1:115.11.0+build2-0ubuntu0.23.10.1) @ mantic2026-05-22ubuntu
ubuntufirefox-mozsymbols (126.0+build2-0ubuntu0.20.04.1) @ focal2026-05-22ubuntu
redhatthunderbird-0:115.11.0-1.el8_102024-06-10redhat
redhatfirefox-0:115.11.0-1.el8_102024-06-10redhat
redhatthunderbird-0:115.11.0-1.el8_22024-05-23redhat
redhatfirefox-0:115.11.0-1.el9_22024-05-20redhat
redhatthunderbird-0:115.11.0-1.el7_92024-05-20redhat
redhatthunderbird-0:115.11.0-1.el8_42024-05-20redhat
redhatthunderbird-0:115.11.0-1.el8_82024-05-20redhat
redhatthunderbird-0:115.11.0-1.el9_02024-05-20redhat
redhatthunderbird-0:115.11.0-1.el9_22024-05-20redhat
redhatthunderbird-0:115.11.0-1.el8_62024-05-20redhat
redhatfirefox-0:115.11.0-1.el9_02024-05-16redhat
redhatfirefox-0:115.11.0-1.el8_22024-05-16redhat
redhatfirefox-0:115.11.0-1.el8_42024-05-16redhat
redhatfirefox-0:115.11.0-1.el8_62024-05-16redhat
redhatfirefox-0:115.11.0-1.el8_82024-05-16redhat
redhatfirefox-0:115.11.0-1.el7_92024-05-16redhat
redhatfirefox-0:115.11.0-1.el9_42024-05-16redhat
redhatthunderbird-0:115.11.0-1.el9_42024-05-16redhat

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
pdfjs-dist—4.2.67—

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

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 9× 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. 2026-07-26 14:53 UTCEPSS rescore
  2. 2026-07-26 14:53 UTCEPSS rescore
  3. 2026-07-25 14:17 UTCEPSS rescore
  4. 2026-07-25 14:16 UTCEPSS rescore
  5. 2026-07-24 14:16 UTCEPSS rescore
  6. 2026-07-23 02:40 UTCEG score recompute▲ 0.20
  7. 2026-07-22 14:07 UTCEPSS rescore
  8. 2026-07-22 14:07 UTCEPSS rescore
  9. 2026-07-20 17:06 UTCEPSS rescore
  10. 2026-07-19 02:28 UTCEPSS rescore
  11. 2026-07-19 02:28 UTCEPSS rescore
  12. 2026-07-18 10:03 UTCEPSS rescore
  13. 2026-07-18 10:03 UTCEPSS rescore
  14. 2026-07-16 17:02 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-15 16:56 UTCEPSS rescore
  17. 2026-07-13 06:12 UTCEPSS rescore
  18. 2026-07-11 08:26 UTCEPSS rescore
  19. 2026-07-11 05:52 UTCOSV refresh
  20. 2026-07-09 19:09 UTCEPSS rescore
  21. 2026-07-09 19:09 UTCEPSS rescore
  22. 2026-07-05 02:29 UTCEPSS rescore
  23. 2026-07-04 06:30 UTCEPSS rescore
  24. 2026-07-01 15:05 UTCEPSS rescore
  25. 2026-06-27 03:07 UTCEPSS rescore
Show 74 more
  1. 2026-06-27 03:07 UTCEPSS rescore
  2. 2026-06-25 13:49 UTCEPSS rescore
  3. 2026-06-24 14:04 UTCEPSS rescore
  4. 2026-06-24 14:04 UTCEPSS rescore
  5. 2026-06-23 21:32 UTCEPSS rescore
  6. 2026-06-23 21:32 UTCEPSS rescore
  7. 2026-06-22 12:56 UTCOSV refresh
  8. 2026-06-21 14:56 UTCEPSS rescore
  9. 2026-06-21 01:59 UTCEPSS rescore
  10. 2026-06-21 01:58 UTCEPSS rescore
  11. 2026-06-18 17:52 UTCEPSS rescore
  12. 2026-06-18 17:52 UTCEPSS rescore
  13. 2026-06-17 17:52 UTCEPSS rescore
  14. 2026-06-17 17:52 UTCEPSS rescore
  15. 2026-06-16 17:52 UTCEPSS rescore
  16. 2026-06-16 17:52 UTCEPSS rescore
  17. 2026-06-15 17:47 UTCEPSS rescore
  18. 2026-06-14 23:17 UTCEPSS rescore
  19. 2026-06-13 22:59 UTCEPSS rescore
  20. 2026-06-13 22:59 UTCEPSS rescore
  21. 2026-06-13 22:59 UTCEPSS rescore
  22. 2026-06-12 23:11 UTCEPSS rescore
  23. 2026-06-12 23:11 UTCEPSS rescore
  24. 2026-06-11 13:59 UTCEPSS rescore
  25. 2026-06-10 22:18 UTCEPSS rescore
  26. 2026-06-10 13:21 UTCEPSS rescore
  27. 2026-06-08 14:16 UTCEPSS rescore
  28. 2026-06-08 14:16 UTCEPSS rescore
  29. 2026-06-07 15:24 UTCEPSS rescore
  30. 2026-06-07 15:24 UTCEPSS rescore
  31. 2026-06-06 13:46 UTCEPSS rescore
  32. 2026-06-06 13:46 UTCEPSS rescore
  33. 2026-06-05 22:46 UTCEPSS rescore
  34. 2026-06-05 22:46 UTCEPSS rescore
  35. 2026-06-05 06:09 UTCEPSS rescore
  36. 2026-06-05 06:09 UTCEPSS rescore
  37. 2026-06-04 19:39 UTCOSV refresh
  38. 2026-06-04 13:11 UTCEPSS rescore
  39. 2026-06-04 13:11 UTCEPSS rescore
  40. 2026-06-02 20:12 UTCEPSS rescore
  41. 2026-05-31 22:30 UTCEPSS rescore
  42. 2026-05-31 22:30 UTCEPSS rescore
  43. 2026-05-31 00:16 UTCEPSS rescore
  44. 2026-05-31 00:16 UTCEPSS rescore
  45. 2026-05-29 13:43 UTCEPSS rescore
  46. 2026-05-28 13:44 UTCEPSS rescore
  47. 2026-05-28 13:44 UTCEPSS rescore
  48. 2026-05-28 13:44 UTCEPSS rescore
  49. 2026-05-27 13:40 UTCEPSS rescore
  50. 2026-05-27 13:40 UTCEPSS rescore
  51. 2026-05-26 13:43 UTCEPSS rescore
  52. 2026-05-26 13:43 UTCEPSS rescore
  53. 2026-05-26 07:18 UTCEPSS rescore
  54. 2026-05-26 07:18 UTCEPSS rescore
  55. 2026-05-26 07:18 UTCEPSS rescore
  56. 2026-05-22 21:16 UTCEPSS rescore
  57. 2026-05-22 21:16 UTCEPSS rescore
  58. 2026-05-22 21:16 UTCEPSS rescore
  59. 2026-05-22 21:16 UTCEPSS rescore
  60. 2026-05-22 21:16 UTCEPSS rescore
  61. 2026-05-22 01:57 UTCEG score recompute
  62. 2026-05-22 01:57 UTCVendor advisory
  63. 2026-05-21 22:42 UTCEPSS rescore
  64. 2026-05-20 22:37 UTCEPSS rescore
  65. 2026-05-20 22:37 UTCEPSS rescore
  66. 2026-05-20 22:37 UTCEPSS rescore
  67. 2026-05-20 22:37 UTCEPSS rescore
  68. 2026-05-20 11:21 UTCEPSS rescore
  69. 2026-05-20 11:21 UTCEPSS rescore
  70. 2026-05-20 11:21 UTCEPSS rescore
  71. 2026-05-20 11:21 UTCEPSS rescore
  72. 2026-05-18 21:30 UTCEPSS rescore
  73. 2026-05-18 21:30 UTCEPSS rescore
  74. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(10 references)

Working exploit code is in the public domain (9 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoC1337rokudenashi/Odoo_PDFjs_CVE-2024-4367.pdf
    First seen Aug 25, 2025

    Odoo ≤17 is vulnerable to CVE-2024-4367, allowing arbitrary JavaScript execution via PDF.js.

    Open source ↗
  • Exploit-DBEDB-52273
    First seen Apr 22, 2025

    Firefox ESR 115.11 - PDF.js Arbitrary JavaScript execution

    Open source ↗
  • GitHub PoCexfil0/WEAPONIZING-CVE-2024-4367
    First seen Jan 5, 2025

    CVE-2024-4367 is a critical vulnerability (CVSS 9.8) in PDF.js, allowing arbitrary JavaScript code execution due to insufficient type checks on the FontMatrix object within PDF files.

    Open source ↗
  • GitHub PoCMasamuneee/CVE-2024-4367-Analysis
    First seen Sep 4, 2024
    Open source ↗
  • GitHub PoCUnHackerEnCapital/PDFernetRemotelo
    First seen Jun 19, 2024

    PoC - Prueba de Concepto de CVE-2024-4367 en conjunto al CVE-2023-38831 en un solo Script

    Open source ↗
  • GitHub PoCsnyk-labs/pdfjs-vuln-demo
    First seen Jun 17, 2024

    This project is intended to serve as a proof of concept to demonstrate exploiting the vulnerability in the PDF.js (pdfjs-dist) library reported in CVE-2024-4367

    Open source ↗
  • GitHub PoCZombie-Kaiser/cve-2024-4367-PoC-fixed
    First seen Jun 13, 2024

    PDF.js是由Mozilla维护的基于JavaScript的PDF查看器。此漏洞允许攻击者在打开恶意 PDF 文件后立即执行任意 JavaScript 代码。这会影响所有 Firefox 用户 （<126），因为 Firefox 使用 PDF.js 来显示 PDF 文件，但也严重影响了许多基于 Web 和 Electron 的应用程序，这些应用程序（间接）使用 PDF.js 进行预览功能。

    Open source ↗
  • GitHub PoCspaceraccoon/detect-cve-2024-4367
    First seen May 22, 2024

    YARA detection rule for CVE-2024-4367 arbitrary javascript execution in PDF.js

    Open source ↗
  • GitHub PoCclarkio/pdfjs-vuln-demo
    First seen May 22, 2024

    This project is intended to serve as a proof of concept to demonstrate exploiting the vulnerability in the PDF.js (pdfjs-dist) library reported in CVE-2024-4367

    Open source ↗
  • GitHub PoCLOURC0D3/CVE-2024-4367-PoC
    First seen May 20, 2024

    CVE-2024-4367 & CVE-2024-34342 Proof of Concept

    Open source ↗

Frequently asked(5)

What is CVE-2024-4367?
CVE-2024-4367 is a critical vulnerability published on May 14, 2024. A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
When was CVE-2024-4367 disclosed?
CVE-2024-4367 was first published in the National Vulnerability Database on May 14, 2024, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-4367 actively exploited?
CVE-2024-4367 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 73% probability of exploitation in the next 30 days, which ranks it in the top 0.6% of all scored CVEs.
What is the CVSS score of CVE-2024-4367?
CVE-2024-4367 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2024-4367?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-4367, 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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