CVE-2026-33891

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 54% 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, secondary
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, a Denial of Service (DoS) vulnerability exists in the node-forge library due to an infinite loop in the BigInteger.modInverse() function (inherited from the bundled jsbn library). When modInverse() is called with a zero value as input, the internal Extended Euclidean Algorithm enters an unreachable exit condition, causing the process to hang indefinitely and consume 100% CPU. Version 1.4.0 patches the issue.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.9%
EPSS %ILE
58th
KEV
Not listed

Published

March 27, 2026

Last Modified

September 4, 2026

Advisory Details (10)

Auto-updated Jul 3, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github, redhat.
redhat

Affected: Red Hat Enterprise Linux 10",

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33891.json
redhatMentions a patch (unverified)

2452450 – (CVE-2026-33891) CVE-2026-33891 node-forge: node-forge: Denial of Service via infinite loop in BigInteger.modInverse()

https://bugzilla.redhat.com/show_bug.cgi?id=2452450
redhatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-33891
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:9742
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:34342
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:24762
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:24761
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:13826
githubMentions a patch (unverified)🟡 PoC Available

Denial of Service via Infinite Loop in BigInteger.modInverse() with Zero Input · Advisory · digitalbazaar/forge · GitHub

https://github.com/digitalbazaar/forge/security/advisories/GHSA-5m6q-g25r-mvwx
github_commit

commit 9bb8d67b99d1 (digitalbazaar/forge)

Fix landed in digitalbazaar/forge commit 9bb8d67b99d1 — awaiting tagged release

https://github.com/digitalbazaar/forge/commit/9bb8d67b99d17e4ebb5fd7596cd699e11f25d023

Vendor Advisories for CVE-2026-33891(6)

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

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcluster-observability-operator/logging-console-plugin-pf4-rhel9:17828392792026-07-01redhat
redhatautomation-gateway-0:2.5.20260422-3.el9ap2026-06-09redhat
redhatautomation-platform-ui-0:2.6.9-1.el9ap2026-06-09redhat
redhatrhdh/rhdh-hub-rhel9:17779032622026-05-05redhat
redhatrhdh/rhdh-hub-rhel9:17767842862026-04-22redhat

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 rangeFix by version rangeDependents
node-forge—
  • every version up to 1.4.0: fixed in 1.4.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 25× 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 216 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-33891?
CVE-2026-33891 is a high vulnerability published on March 27, 2026. Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, a Denial of Service (DoS) vulnerability exists in the node-forge library due to an infinite loop in the BigInteger.modInverse() function (inherited from the bundled jsbn…
When was CVE-2026-33891 disclosed?
CVE-2026-33891 was first published on March 27, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33891 actively exploited?
CVE-2026-33891 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33891?
CVE-2026-33891 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-33891?
A fix for CVE-2026-33891 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-33891 are linked in the Vendor Advisories panel on this page.

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