CVE-2026-101015

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-09-28. A secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.3Exploit: Elevated riskExposed services: Not assessed

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

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is some unknown functionality of the file policy.c of the component Domain Handler. Executing a manipulation can lead to improper validation of unsafe equivalence in input. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
7.3
EG Score
7.3HIGHhigh confidence
EG Risk
64
EG Risk 64/100CISA 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
Severity73% × 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
0.3%
EPSS %ILE
19th
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 28, 2026

Last Modified

October 1, 2026

Advisory Details (1)

Auto-updated Sep 28, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

OpenDMARC does not apply IDNA/UTS-46 mapping to the From domain, so a Unicode look-alike separator disables DMARC for any ASCII domain (OpenDMARC ≤ 1.4.2; latest version tested 2026-07-30)

https://weitongli.com/share/opendmarc-unicode-dot-bypass.html

Vendor Advisories for CVE-2026-101015(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 34× in last 7d / 34× 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 02:44 UTCGHSA enrichment
  2. 2026-10-03 14:53 UTCEG score recompute
  3. 2026-10-03 14:53 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 03:02 UTCEG score recompute
  6. 2026-10-03 03:02 UTCGHSA enrichment
  7. 2026-10-02 15:10 UTCGHSA enrichment
  8. 2026-10-02 03:18 UTCEG score recompute
  9. 2026-10-02 03:18 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 15:24 UTCEG score recompute
  12. 2026-10-01 15:24 UTCGHSA enrichment
  13. 2026-10-01 15:22 UTCNVD updateCVSS v4 → 5.5
  14. 2026-10-01 14:22 UTCEG score recompute
  15. 2026-10-01 14:22 UTCGHSA enrichment
  16. 2026-10-01 14:20 UTCMITRE cvelistV5CVSS v4 → 6.9
  17. 2026-10-01 02:46 UTCEG score recompute
  18. 2026-10-01 02:46 UTCGHSA enrichment
  19. 2026-09-30 15:02 UTCEPSS rescore
  20. 2026-09-30 14:55 UTCGHSA enrichment
  21. 2026-09-30 03:03 UTCEG score recompute
  22. 2026-09-30 03:03 UTCGHSA enrichment
  23. 2026-09-29 15:20 UTCEPSS rescore
  24. 2026-09-29 15:12 UTCGHSA enrichment
  25. 2026-09-29 03:20 UTCEG score recompute
Show 9 more
  1. 2026-09-29 03:20 UTCGHSA enrichment
  2. 2026-09-28 15:28 UTCEG score recompute
  3. 2026-09-28 15:28 UTCGHSA enrichment
  4. 2026-09-28 13:50 UTCEPSS rescore
  5. 2026-09-28 09:32 UTCEG score recompute
  6. 2026-09-28 09:32 UTCGHSA enrichment
  7. 2026-09-28 09:31 UTCNVD updateCVSS v4 → 5.5
  8. 2026-09-28 08:42 UTCEG score recompute
  9. 2026-09-28 08:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-101015?
CVE-2026-101015 is a high vulnerability published on September 28, 2026. A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is some unknown functionality of the file policy.c of the component Domain Handler. Executing a manipulation can lead to improper validation of unsafe equivalence in input. The attack may be launched…
When was CVE-2026-101015 disclosed?
CVE-2026-101015 was first published on September 28, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-101015 actively exploited?
CVE-2026-101015 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-101015?
CVE-2026-101015 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-101015?
No fix for CVE-2026-101015 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-2026-101015 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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