CVE-2026-100835

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-27. A secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Contrast before 1.16.0 is susceptible to remote attestation relay attacks. Contrast accepted any TEE attestation report that verified correctly and contained the expected firmware patch levels and software measurements, regardless of which machine produced it, so attestation was not bound to specific, physically trusted hardware. An attacker who can both intercept network traffic between the CLI and the Coordinator (or between the Coordinator and an attested component) and forge reports or extract secrets from any single TEE machine under their physical control can relay such a report to impersonate a Contrast Coordinator or a Contrast workload, defeating identity verification in Contrast's attested TLS (aTLS).

CVSS v3
7.4
EG Score
7.4HIGHhigh confidence
EG Risk
33
EG Risk 33/100CISA 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
Severity74% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 27, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Sep 27, 2026
Patch available. Sources: github.
generic

Contrast before 1.16.0 Remote Attestation Relay Attack | Advisories | VulnCheck

https://www.vulncheck.com/advisories/contrast-before-1.16.0-remote-attestation-relay-attack
github Patch Available

Remote attestation is susceptible to relay attacks · Advisory · edgelesssys/contrast · GitHub

https://github.com/edgelesssys/contrast/security/advisories/GHSA-hjgc-jc5v-fw7h

Vendor Advisories for CVE-2026-100835(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 30× in last 7d / 33× 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 06:02 UTCGHSA enrichment
  2. 2026-10-03 17:51 UTCEG score recompute
  3. 2026-10-03 17:51 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 05:39 UTCGHSA enrichment
  6. 2026-10-02 17:27 UTCEG score recompute
  7. 2026-10-02 17:27 UTCGHSA enrichment
  8. 2026-10-02 05:14 UTCEG score recompute
  9. 2026-10-02 05:13 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 17:00 UTCGHSA enrichment
  12. 2026-10-01 04:42 UTCGHSA enrichment
  13. 2026-09-30 16:27 UTCEG score recompute
  14. 2026-09-30 16:27 UTCGHSA enrichment
  15. 2026-09-30 15:31 UTCEG score recompute
  16. 2026-09-30 15:31 UTCGHSA enrichment
  17. 2026-09-30 15:02 UTCEPSS rescore
  18. 2026-09-30 04:08 UTCGHSA enrichment
  19. 2026-09-29 15:50 UTCEG score recompute
  20. 2026-09-29 15:50 UTCGHSA enrichment
  21. 2026-09-29 15:20 UTCEPSS rescore
  22. 2026-09-29 03:39 UTCEG score recompute
  23. 2026-09-29 03:39 UTCGHSA enrichment
  24. 2026-09-28 15:25 UTCGHSA enrichment
  25. 2026-09-28 15:13 UTCEG score recompute
Show 8 more
  1. 2026-09-28 15:13 UTCGHSA enrichment
  2. 2026-09-28 13:50 UTCEPSS rescore
  3. 2026-09-28 03:01 UTCGHSA enrichment
  4. 2026-09-27 14:48 UTCEG score recompute
  5. 2026-09-27 14:48 UTCGHSA enrichment
  6. 2026-09-27 02:37 UTCEG score recompute
  7. 2026-09-27 01:53 UTCEG score recompute
  8. 2026-09-27 01:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100835?
CVE-2026-100835 is a high vulnerability published on September 27, 2026. Contrast before 1.16.0 is susceptible to remote attestation relay attacks. Contrast accepted any TEE attestation report that verified correctly and contained the expected firmware patch levels and software measurements, regardless of which machine produced it, so attestation was not bound to…
When was CVE-2026-100835 disclosed?
CVE-2026-100835 was first published on September 27, 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-2026-100835 actively exploited?
CVE-2026-100835 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100835?
CVE-2026-100835 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100835?
A fix for CVE-2026-100835 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100835 are linked in the Vendor Advisories panel on this page.

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