CVE-2026-105219

HIGHPre-NVD 7.57.5
EchelonGraph scoreHIGH confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-10-04. 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 — 3 sources updated this week

Also known asEUVD-2026-92122 (ENISA EUVD) · GHSA-fp33-4hh4-xjj5 (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan mitigationThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Mammoth.js 1.3.0 before 1.12.3 contains a regular expression denial of service vulnerability in the style map tokeniser in lib/styles/parser/tokeniser.js due to overlapping regex alternatives. Attackers can supply a crafted .docx with an unterminated quoted string of repeated backslash escapes in mammoth/style-map to block the Node.js event loop.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
49
EG Risk 49/100

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.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it.
EPSS PROB
0.4%
EPSS %ILE
29th
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
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.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).

An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it.

Exploitation none (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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

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

October 4, 2026

Last Modified

October 6, 2026

Advisory Details (5)

Auto-updated Oct 4, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
Web page

Mammoth.js 1.3.0 before 1.12.3 ReDoS via Style Map Tokeniser | Advisories | VulnCheck

https://www.vulncheck.com/advisories/mammoth-js-1.3.0-before-1.12.3-redos-via-style-map-tokeniser
Web page

GitHub - mwilliamson/mammoth.js: Convert Word documents (.docx files) to HTML · GitHub

https://github.com/mwilliamson/mammoth.js
Web page

mammoth.js/lib/styles/parser/tokeniser.js at 1.12.2 · mwilliamson/mammoth.js · GitHub

https://github.com/mwilliamson/mammoth.js/blob/1.12.2/lib/styles/parser/tokeniser.js#L6-L30
GitHub commit

commit dc49225425c2 (mwilliamson/mammoth.js)

Fix landed in mwilliamson/mammoth.js commit dc49225425c2 — awaiting tagged release

https://github.com/mwilliamson/mammoth.js/commit/dc49225425c2c07de0a6dc3529f2386c82a032b4
Web page

ReDoS in style-map parser: malicious .docx with embedded style map freezes conversion (exponential backtracking) · Issue #487 · mwilliamson/mammoth.js · GitHub

https://github.com/mwilliamson/mammoth.js/issues/487

Vendor Advisories for CVE-2026-105219(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 69× 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.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-27 19:32 UTCEG score recompute
  7. 2026-10-27 19:32 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-25 14:55 UTCEG score recompute
  12. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-10-20 19:13 UTCEG score recompute
  17. 2026-10-20 19:13 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  18. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  21. 2026-10-18 05:09 UTCEG score recompute
  22. 2026-10-17 19:37 UTCEG score recompute
  23. 2026-10-17 19:37 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  25. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 27th percentile
Show 44 more
  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  4. 2026-10-12 16:40 UTCEG score recompute
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  6. 2026-10-11 22:17 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-11 20:15 UTCEG score recompute
  8. 2026-10-11 18:27 UTCEG score recompute
  9. 2026-10-11 15:01 UTCEG score recompute
  10. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-11 11:02 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  12. 2026-10-10 23:45 UTCEG score recompute
  13. 2026-10-10 23:45 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  15. 2026-10-10 12:30 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-10 01:15 UTCEG score recompute
  17. 2026-10-10 01:15 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  18. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  19. 2026-10-09 13:58 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-10-09 02:42 UTCEG score recompute
  21. 2026-10-09 02:42 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-10-08 15:28 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-10-08 02:06 UTCEG score recompute
  25. 2026-10-08 02:06 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  26. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  27. 2026-10-07 14:51 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  28. 2026-10-07 03:36 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-10-06 16:20 UTCEG score recompute
  30. 2026-10-06 16:20 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  32. 2026-10-06 14:01 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-10-06 02:47 UTCEG score recompute
  34. 2026-10-06 02:47 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  36. 2026-10-05 15:32 UTCEG score recompute
  37. 2026-10-05 15:32 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-10-05 15:01 UTCEG score recompute
  39. 2026-10-05 15:01 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  40. 2026-10-05 05:45 UTCEG score recompute
  41. 2026-10-05 05:45 UTCGHSA enrichmentGHSA-fp33-4hh4-xjj5 · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-10-04 18:30 UTCEG score recompute
  43. 2026-10-04 17:18 UTCEG score recomputeFirst assessed: 7.5 HIGH
  44. 2026-10-04 17:18 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-105219?
CVE-2026-105219 is a high-severity vulnerability; its CVE record was published on October 4, 2026. Mammoth.js 1.3.0 before 1.12.3 contains a regular expression denial of service vulnerability in the style map tokeniser in lib/styles/parser/tokeniser.js due to overlapping regex alternatives. Attackers can supply a crafted .docx with an unterminated quoted string of repeated backslash escapes in…
When was CVE-2026-105219 made public?
CVE-2026-105219 was made public on September 1, 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 October 4, 2026. EchelonGraph's copy of the record carries a last-modified date of October 6, 2026; the record at its source may have been updated since.
Is CVE-2026-105219 actively exploited?
CVE-2026-105219 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-105219?
CVE-2026-105219 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-2026-105219?
An upstream fix for CVE-2026-105219 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-105219 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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