CVE-2026-85393

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this weekElevated

Also known asEUVD-2026-70670 (ENISA EUVD) · GHSA-86w9-cpqp-85rv (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
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: 0.2%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
16th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. 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 yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

September 3, 2026

Last Modified

September 24, 2026

Advisory Details (6)

Auto-updated Sep 3, 2026
Patch available. Sources: github.
Web page

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 advisoryMentions a patch (unverified)

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
Web page

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

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

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

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

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
Web page

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatansible-automation-platform/bootc-automation-portal-rhel9:17926411022026-10-22redhat
redhatansible-automation-platform-26/lightspeed-rhel9:17896568842026-09-23redhat
redhatansible-automation-platform-25/lightspeed-rhel8:17896858372026-09-23redhat
npmnode-forge—ghsa

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 through 1.4.0: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 73× 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 100 of 227 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. None are among the latest 100 rows. The 127 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  7. 2026-10-27 11:08 UTCEG score recompute
  8. 2026-10-27 11:08 UTCVendor advisory
  9. 2026-10-27 11:08 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-10-25 13:55 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  19. 2026-10-18 23:56 UTCEG score recompute
  20. 2026-10-18 23:56 UTCVendor advisory
  21. 2026-10-18 23:56 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  23. 2026-10-18 03:05 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  25. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.3% · 24th percentile
Show 75 more
  1. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-10-12 16:00 UTCEG score recompute
  6. 2026-10-12 16:00 UTCVendor advisory
  7. 2026-10-12 15:59 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  8. 2026-10-12 14:52 UTCEG score recompute
  9. 2026-10-11 19:17 UTCEG score recompute
  10. 2026-10-11 16:34 UTCEG score recompute
  11. 2026-10-11 13:51 UTCEG score recompute
  12. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  14. 2026-10-10 12:10 UTCVendor advisory
  15. 2026-10-10 12:10 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-09 23:29 UTCEG score recompute
  17. 2026-10-09 23:29 UTCVendor advisory
  18. 2026-10-09 23:28 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  20. 2026-10-09 01:25 UTCEG score recompute
  21. 2026-10-09 01:25 UTCVendor advisory
  22. 2026-10-09 01:25 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  24. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  25. 2026-10-07 23:26 UTCVendor advisory
  26. 2026-10-07 23:26 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  27. 2026-10-07 07:51 UTCVendor advisory
  28. 2026-10-07 07:51 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-10-06 19:09 UTCEG score recompute
  30. 2026-10-06 19:09 UTCVendor advisory
  31. 2026-10-06 19:09 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  32. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  33. 2026-10-06 06:23 UTCEG score recompute
  34. 2026-10-06 06:23 UTCVendor advisory
  35. 2026-10-06 06:23 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  36. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  37. 2026-10-05 16:40 UTCVendor advisory
  38. 2026-10-05 16:40 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-10-05 03:24 UTCEG score recompute
  40. 2026-10-05 03:24 UTCVendor advisory
  41. 2026-10-05 03:24 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  43. 2026-10-04 14:27 UTCVendor advisory
  44. 2026-10-04 14:27 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-10-04 01:45 UTCEG score recompute
  46. 2026-10-04 01:45 UTCVendor advisory
  47. 2026-10-04 01:45 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  48. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  49. 2026-10-03 12:45 UTCVendor advisory
  50. 2026-10-03 12:45 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  51. 2026-10-02 21:57 UTCEG score recompute
  52. 2026-10-02 21:57 UTCVendor advisory
  53. 2026-10-02 21:57 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  54. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  55. 2026-10-02 09:16 UTCVendor advisory
  56. 2026-10-02 09:16 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-10-01 20:35 UTCEG score recompute
  58. 2026-10-01 20:35 UTCVendor advisory
  59. 2026-10-01 20:35 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  61. 2026-10-01 07:48 UTCVendor advisory
  62. 2026-10-01 07:48 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-09-30 19:07 UTCEG score recompute
  64. 2026-09-30 19:07 UTCVendor advisory
  65. 2026-09-30 19:07 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  66. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  67. 2026-09-30 02:53 UTCEG score recompute
  68. 2026-09-30 02:53 UTCVendor advisory
  69. 2026-09-30 02:53 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  70. 2026-09-29 09:27 UTCEG score recompute
  71. 2026-09-29 09:27 UTCVendor advisory
  72. 2026-09-29 09:27 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-09-28 20:44 UTCEG score recompute
  74. 2026-09-28 20:44 UTCVendor advisory
  75. 2026-09-28 20:44 UTCGHSA enrichmentGHSA-86w9-cpqp-85rv · GitHub severity HIGH · GitHub CVSS 7.5

Frequently asked(5)

What is CVE-2026-85393?
CVE-2026-85393 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2026-85393 was made public on July 6, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 3, 2026. EchelonGraph's copy of the record carries a last-modified date of September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-85393 actively exploited?
CVE-2026-85393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-85393?
CVE-2026-85393 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-2026-85393?
A fix for CVE-2026-85393 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-85393 are linked in the Vendor Advisories panel on this page.

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