CVE-2026-2327

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.7% (53rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this weekElevated
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: 0.7%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Versions of the package markdown-it from 13.0.0 and before 14.1.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of the regex /\*+$/ in the linkify function. An attacker can supply a long sequence of * characters followed by a non-matching character, which triggers excessive backtracking and may lead to a denial-of-service condition.

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
0.7%
EPSS %ILE
53rd
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.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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: 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.

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

February 12, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
Patch available. Sources: github_commit.
Web page

Regular Expression Denial of Service (ReDoS) in markdown-it | CVE-2026-2327 | Snyk

https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
Web page

markdown-it_ReDoS.md · GitHub

https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
GitHub commit

commit 4b4bbcae5e09 (markdown-it/markdown-it)

Fix landed in markdown-it/markdown-it commit 4b4bbcae5e09 — awaiting tagged release

https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26

Vendor Advisories for CVE-2026-2327(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatdevspaces/openvsx-rhel9:17795282242026-05-28redhat

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
markdown-it—
  • 13.0.0 up to 14.1.1: fixed in 14.1.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 30× 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 95 of 199 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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 104 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  2. 2026-10-18 03:54 UTCEG score recompute
  3. 2026-10-17 17:09 UTCEG score recompute
  4. 2026-10-17 17:09 UTCVendor advisory
  5. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  6. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  7. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  8. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  9. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  10. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  11. 2026-10-12 16:21 UTCEG score recompute
  12. 2026-10-11 20:03 UTCEG score recompute
  13. 2026-10-11 17:16 UTCEG score recompute
  14. 2026-10-11 14:48 UTCEG score recompute
  15. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-10-09 08:28 UTCOSV refresh
  19. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  20. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  24. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  25. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
Show 70 more
  1. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  2. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  3. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  4. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  5. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-09-19 15:33 UTCOSV refresh
  7. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  11. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  12. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  15. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  16. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  17. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  18. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  19. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  20. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  21. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  22. 2026-08-31 19:04 UTCOSV refresh
  23. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  24. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  25. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  26. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  27. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  28. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  29. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  30. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  31. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  32. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  33. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  34. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  35. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  36. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  37. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  38. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  39. 2026-08-14 22:36 UTCVendor advisory
  40. 2026-08-14 10:15 UTCEG score recompute
  41. 2026-08-14 10:15 UTCVendor advisory
  42. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  43. 2026-08-13 02:32 UTCEG score recompute
  44. 2026-08-13 02:32 UTCVendor advisory
  45. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  46. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  47. 2026-08-11 08:58 UTCEG score recompute
  48. 2026-08-11 08:58 UTCVendor advisory
  49. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  50. 2026-08-10 02:57 UTCVendor advisory
  51. 2026-08-09 14:55 UTCEG score recompute
  52. 2026-08-09 14:55 UTCVendor advisory
  53. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  54. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  55. 2026-08-08 09:52 UTCVendor advisory
  56. 2026-08-07 22:04 UTCEG score recompute
  57. 2026-08-07 22:04 UTCVendor advisory
  58. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  59. 2026-08-06 03:57 UTCEG score recompute
  60. 2026-08-06 03:57 UTCVendor advisory
  61. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  62. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  63. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.7% · 47th percentile
  64. 2026-08-02 20:44 UTCEG score recompute▲ 2.20
  65. 2026-08-02 20:44 UTCVendor advisory
  66. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  67. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  68. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  69. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  70. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.5% · 40th percentile

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

Frequently asked(5)

What is CVE-2026-2327?
CVE-2026-2327 is a high-severity vulnerability; its CVE record was published on February 12, 2026. Versions of the package markdown-it from 13.0.0 and before 14.1.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of the regex /\+$/ in the linkify function. An attacker can supply a long sequence of characters followed by a non-matching character, which triggers…
When was the CVE record for CVE-2026-2327 published?
The CVE record for CVE-2026-2327 was published on February 12, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-2327 actively exploited?
CVE-2026-2327 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-2327?
CVE-2026-2327 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-2327?
A fix for CVE-2026-2327 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-2327 are linked in the Vendor Advisories panel on this page.

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