CVE-2026-103043

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-30. 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 weekElevated
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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

anchorme through 3.0.8 contains a regular expression denial of service vulnerability in the IPv6 host extraction regex due to catastrophic backtracking. Attackers can supply specially crafted input strings with repeated patterns to cause exponential regex engine backtracking, blocking the Node.js event loop and denying service to other requests.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 29, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Sep 29, 2026
No patch confirmed yet.
generic

anchorme through 3.0.8 Regular Expression Denial of Service | Advisories | VulnCheck

https://www.vulncheck.com/advisories/anchorme-through-3.0.8-regular-expression-denial-of-service
generic

GitHub - alexcorvi/anchorme.js: Tiny, fast, efficient, feature rich Javascript library to detect links / URLs / Emails in text and convert them to clickable HTML anchor links · GitHub

https://github.com/alexcorvi/anchorme.js
generic

anchorme.js/src/index.ts at f3ae9850baa344f27b46bb149e9b891831d273b1 · alexcorvi/anchorme.js · GitHub

https://github.com/alexcorvi/anchorme.js/blob/f3ae9850baa344f27b46bb149e9b891831d273b1/src/index.ts#L109
generic

ReDoS in anchorme <= 3.0.8 (CWE-1333) - catastrophic backtracking in the ipv6 extraction, reachable through the default anchorme() API · GitHub

https://gist.github.com/mmadersbacher/46050b4224eb979431986cdef1dd2ad3

Vendor Advisories for CVE-2026-103043(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 23× in last 7d / 23× 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. 2026-10-04 01:10 UTCEG score recompute
  2. 2026-10-04 01:10 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-03 12:23 UTCGHSA enrichment
  5. 2026-10-02 23:36 UTCEG score recompute
  6. 2026-10-02 23:35 UTCGHSA enrichment
  7. 2026-10-02 10:47 UTCGHSA enrichment
  8. 2026-10-01 21:59 UTCEG score recompute
  9. 2026-10-01 21:59 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 09:09 UTCGHSA enrichment
  12. 2026-09-30 20:23 UTCEG score recompute
  13. 2026-09-30 20:23 UTCGHSA enrichment
  14. 2026-09-30 19:26 UTCEG score recompute
  15. 2026-09-30 19:26 UTCGHSA enrichment
  16. 2026-09-30 17:45 UTCEG score recompute
  17. 2026-09-30 17:45 UTCGHSA enrichment
  18. 2026-09-30 15:02 UTCEPSS rescore
  19. 2026-09-30 12:12 UTCEG score recompute
  20. 2026-09-30 12:12 UTCGHSA enrichment
  21. 2026-09-29 23:25 UTCEG score recompute
  22. 2026-09-29 22:58 UTCEG score recompute
  23. 2026-09-29 22:58 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-103043?
CVE-2026-103043 is a high vulnerability published on September 29, 2026. anchorme through 3.0.8 contains a regular expression denial of service vulnerability in the IPv6 host extraction regex due to catastrophic backtracking. Attackers can supply specially crafted input strings with repeated patterns to cause exponential regex engine backtracking, blocking the Node.js…
When was CVE-2026-103043 disclosed?
CVE-2026-103043 was first published on September 29, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103043 actively exploited?
CVE-2026-103043 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103043?
CVE-2026-103043 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-2026-103043?
No fix for CVE-2026-103043 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-103043 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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