CVE-2026-77426

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 59% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

Unleash is an open-source feature management platform. Prior to 8.0.3, the Unleash admin API contains five authorization vulnerabilities. POST /api/admin/segments/strategies assigns the Promise returned by hasPermission without awaiting it, allowing authenticated users to modify segment assignments without UPDATE_FEATURE_STRATEGY permission for the target project and environment. GET /api/admin/projects/:projectId/features/:featureName/environments/:environment/variants does not bind the requested feature to projectId, allowing cross-project variant configuration disclosure. GET .../strategies/:strategyId uses strategyId without validating the project and feature context, allowing cross-project strategy configuration disclosure. getEnvironmentInfo does not validate that the requested feature belongs to the supplied project, allowing cross-project environment information disclosure. PUT /:projectId/tags accepts feature identifiers without verifying that they belong to the URL project, allowing cross-project tag modification. This issue is fixed in version 8.0.3.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

September 22, 2026

Last Modified

September 23, 2026

Advisory Details (7)

Auto-updated Sep 22, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v8.0.3

Patch available: Unleash/unleash v8.0.3

https://github.com/Unleash/unleash/releases/tag/v8.0.3
github_commit Patch Available

commit dd61d0e10f59 (Unleash/unleash)

Patch available: Unleash/unleash v8.0.3 (contains commit dd61d0e10f59)

https://github.com/Unleash/unleash/commit/dd61d0e10f5977a2e5de78df467c3a17c09fbcef
github_commit Patch Available

commit c93a963e95e1 (Unleash/unleash)

Patch available: Unleash/unleash v7.4.2 (contains commit c93a963e95e1)

https://github.com/Unleash/unleash/commit/c93a963e95e1b7bf1bca2a7729282a48d0eb2f6a
github_commit Patch Available

commit bea7effd3687 (Unleash/unleash)

Patch available: Unleash/unleash v8.0.3 (contains commit bea7effd3687)

https://github.com/Unleash/unleash/commit/bea7effd3687425630423f662136d548e100154d
github_commit Patch Available

commit ace121c922d2 (Unleash/unleash)

Patch available: Unleash/unleash v7.4.2 (contains commit ace121c922d2)

https://github.com/Unleash/unleash/commit/ace121c922d2e3eb6f68d95b0b6ab2fc8d824ea1
github_commit Patch Available

commit 7bb2829fc407 (Unleash/unleash)

Patch available: Unleash/unleash v7.5.1 (contains commit 7bb2829fc407)

https://github.com/Unleash/unleash/commit/7bb2829fc40791aa478e8ffca149c11b0f9cb05a
github Patch Available

Missing await on permission check + cross-project IDOR in admin API · Advisory · Unleash/unleash · GitHub

https://github.com/Unleash/unleash/security/advisories/GHSA-72h8-wp98-7hch

Vendor Advisories for CVE-2026-77426(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
unleash-server—8.0.3—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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. 2026-09-23 18:25 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescore
  3. 2026-09-23 15:20 UTCEG score recompute
  4. 2026-09-23 15:15 UTCEG score recompute
  5. 2026-09-22 21:33 UTCEG score recompute
  6. 2026-09-22 20:43 UTCEG score recompute
  7. 2026-09-22 20:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77426?
CVE-2026-77426 is a high vulnerability published on September 22, 2026. Unleash is an open-source feature management platform. Prior to 8.0.3, the Unleash admin API contains five authorization vulnerabilities. POST /api/admin/segments/strategies assigns the Promise returned by hasPermission without awaiting it, allowing authenticated users to modify segment assignments…
When was CVE-2026-77426 disclosed?
CVE-2026-77426 was first published in the National Vulnerability Database on September 22, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77426 actively exploited?
CVE-2026-77426 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 59.2% of all scored CVEs.
What is the CVSS score of CVE-2026-77426?
CVE-2026-77426 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-77426?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77426, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-77426

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