CVE-2026-85393

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-03. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
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%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

node-forge through 1.4.0 fails to validate element count in nested DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification. Attackers can embed garbage bytes inside the DigestAlgorithm sequence to forge valid signatures for arbitrary messages using low-exponent RSA keys. This is an incomplete fix for CVE-2026-33894.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 3, 2026

Advisory Details (6)

Auto-updated Sep 3, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

node-forge through 1.4.0 RSA PKCS#1 v1.5 Signature Forgery via Nested DigestAlgorithm Padding | Advisories | VulnCheck

https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-padding
github Patch Available🟡 PoC Available

Forge has signature forgery in RSA-PKCS due to ASN.1 extra field · CVE-2026-33894 · GitHub Advisory Database · GitHub

https://github.com/advisories/GHSA-ppp5-5v6c-4jwp
generic

forge/lib/asn1.js at v1.4.0 · digitalbazaar/forge · GitHub

https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js
generic

forge/lib/rsa.js at v1.4.0 · digitalbazaar/forge · GitHub

https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js
generic

GitHub - digitalbazaar/forge: A native implementation of TLS in Javascript and tools to write crypto-based and network-heavy webapps · GitHub

https://github.com/digitalbazaar/forge
generic

RSA PKCS#1 v1.5 signature forgery via garbage in DigestAlgorithm (incomplete CVE-2026-33894 fix) · Issue #1149 · digitalbazaar/forge · GitHub

https://github.com/digitalbazaar/forge/issues/1149

Vendor Advisories for CVE-2026-85393(2)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
node-forge—1.4.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 41× in last 7d / 78× 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. 2026-09-19 14:05 UTCVendor advisory
  2. 2026-09-19 14:05 UTCGHSA enrichment
  3. 2026-09-19 01:19 UTCEG score recompute
  4. 2026-09-19 01:19 UTCVendor advisory
  5. 2026-09-19 01:19 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 12:38 UTCVendor advisory
  8. 2026-09-18 12:38 UTCGHSA enrichment
  9. 2026-09-17 23:57 UTCEG score recompute
  10. 2026-09-17 23:57 UTCVendor advisory
  11. 2026-09-17 23:57 UTCGHSA enrichment
  12. 2026-09-17 19:32 UTCEPSS rescore
  13. 2026-09-17 10:25 UTCVendor advisory
  14. 2026-09-17 10:25 UTCGHSA enrichment
  15. 2026-09-16 21:44 UTCEG score recompute
  16. 2026-09-16 21:44 UTCVendor advisory
  17. 2026-09-16 21:44 UTCGHSA enrichment
  18. 2026-09-16 14:09 UTCEPSS rescore
  19. 2026-09-16 09:03 UTCEG score recompute
  20. 2026-09-16 09:03 UTCVendor advisory
  21. 2026-09-16 09:03 UTCGHSA enrichment
  22. 2026-09-16 05:15 UTCEPSS rescore
  23. 2026-09-15 20:01 UTCVendor advisory
  24. 2026-09-15 20:01 UTCGHSA enrichment
  25. 2026-09-15 07:20 UTCEG score recompute
Show 53 more
  1. 2026-09-15 07:20 UTCVendor advisory
  2. 2026-09-15 07:20 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-14 18:39 UTCVendor advisory
  6. 2026-09-14 18:39 UTCGHSA enrichment
  7. 2026-09-14 05:58 UTCVendor advisory
  8. 2026-09-14 05:58 UTCGHSA enrichment
  9. 2026-09-13 17:17 UTCEG score recompute
  10. 2026-09-13 17:17 UTCVendor advisory
  11. 2026-09-13 17:17 UTCGHSA enrichment
  12. 2026-09-13 04:36 UTCVendor advisory
  13. 2026-09-13 04:36 UTCGHSA enrichment
  14. 2026-09-12 15:55 UTCEG score recompute
  15. 2026-09-12 15:55 UTCVendor advisory
  16. 2026-09-12 15:55 UTCGHSA enrichment
  17. 2026-09-12 03:14 UTCEG score recompute
  18. 2026-09-12 03:14 UTCVendor advisory
  19. 2026-09-12 03:14 UTCGHSA enrichment
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 14:33 UTCEG score recompute
  23. 2026-09-11 14:33 UTCGHSA enrichment
  24. 2026-09-11 01:52 UTCGHSA enrichment
  25. 2026-09-10 13:11 UTCEG score recompute
  26. 2026-09-10 13:11 UTCGHSA enrichment
  27. 2026-09-10 00:30 UTCGHSA enrichment
  28. 2026-09-09 11:47 UTCVendor advisory
  29. 2026-09-09 11:47 UTCGHSA enrichment
  30. 2026-09-08 23:06 UTCEG score recompute
  31. 2026-09-08 23:06 UTCVendor advisory
  32. 2026-09-08 23:06 UTCGHSA enrichment
  33. 2026-09-08 22:01 UTCEPSS rescore
  34. 2026-09-08 03:31 UTCEG score recompute
  35. 2026-09-08 03:31 UTCVendor advisory
  36. 2026-09-08 03:31 UTCGHSA enrichment
  37. 2026-09-07 14:50 UTCVendor advisory
  38. 2026-09-07 14:50 UTCGHSA enrichment
  39. 2026-09-07 00:34 UTCEG score recompute
  40. 2026-09-07 00:34 UTCGHSA enrichment
  41. 2026-09-06 13:48 UTCEPSS rescore
  42. 2026-09-06 11:52 UTCGHSA enrichment
  43. 2026-09-05 23:11 UTCEG score recompute
  44. 2026-09-05 23:11 UTCGHSA enrichment
  45. 2026-09-05 15:31 UTCEPSS rescore
  46. 2026-09-05 10:30 UTCGHSA enrichment
  47. 2026-09-04 21:48 UTCEG score recompute
  48. 2026-09-04 21:47 UTCGHSA enrichment
  49. 2026-09-04 09:04 UTCEG score recompute
  50. 2026-09-04 09:04 UTCGHSA enrichment
  51. 2026-09-03 19:19 UTCEG score recompute
  52. 2026-09-03 18:59 UTCEG score recompute
  53. 2026-09-03 18:58 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-85393?
CVE-2026-85393 is a high vulnerability published on September 3, 2026. node-forge through 1.4.0 fails to validate element count in nested DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification. Attackers can embed garbage bytes inside the DigestAlgorithm sequence to forge valid signatures for arbitrary messages using low-exponent RSA keys. This is an…
When was CVE-2026-85393 disclosed?
CVE-2026-85393 was first published in the National Vulnerability Database on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85393 actively exploited?
CVE-2026-85393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.3% of all scored CVEs.
What is the CVSS score of CVE-2026-85393?
CVE-2026-85393 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-85393?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85393, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-85393

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