CVE-2026-77426Network attack vectorHinoki check available

Cross-project disclosure and modification via authorization flaws

Published Sep 22, 2026 · Updated Sep 22, 2026

Missing authorization in the Unleash admin API before 8.0.3 allows remote authenticated users to read and alter cross-project configuration. The segment strategy handler treats the Promise from hasPermission as truthy, while four resource handlers fail to bind requested objects to the URL project. Authenticated access alone is sufficient to expose variant, strategy, and environment data or change segment assignments and tags across project boundaries.

CVSS severity7.1
High
EPSS probability0.48%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in the Unleash admin API before 8.0.3 allows remote authenticated users to read and alter cross-project configuration. The segment strategy handler treats the Promise from hasPermission as truthy, while four resource handlers fail to bind requested objects to the URL project. Authenticated access alone is sufficient to expose variant, strategy, and environment data or change segment assignments and tags across project boundaries.

The record

CVE
CVE-2026-77426
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Unleash
Product
Unleash
Classifications
CWE-639, CWE-862, T1565.001, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Unleash · Unleashversion=< 8.0.3

Published CVSS scores

7.1GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CWE-862Missing Authorization
T1565.001Stored Data Manipulation
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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