CVE-2026-50167Network attack vector

Authenticated cross-user metadata disclosure via missing ownership checks

Published Aug 18, 2026 · Updated Aug 19, 2026

Authorization bypass in Kurrier before 1.2.4 allows remote authenticated users to read other users' webhook and identity metadata via API requests. The GET and list handlers in apps/worker/server/routes/api/kurrier/webhooks/[id].get.ts, apps/worker/server/routes/api/kurrier/webhooks/index.get.ts, apps/worker/server/routes/api/kurrier/identities/[id].get.ts, and apps/worker/server/routes/api/kurrier/identities/index.get.ts accepted a valid API key but fetched records by supplied IDs or returned lists without constraining queries to the caller's ownerId. A valid API key is required, anonymous and invalid-key requests are rejected, and the exposed operations are bounded to cross-user enumeration and metadata disclosure rather than modification.

CVSS severity5.3
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Kurrier before 1.2.4 allows remote authenticated users to read other users' webhook and identity metadata via API requests. The GET and list handlers in apps/worker/server/routes/api/kurrier/webhooks/[id].get.ts, apps/worker/server/routes/api/kurrier/webhooks/index.get.ts, apps/worker/server/routes/api/kurrier/identities/[id].get.ts, and apps/worker/server/routes/api/kurrier/identities/index.get.ts accepted a valid API key but fetched records by supplied IDs or returned lists without constraining queries to the caller's ownerId. A valid API key is required, anonymous and invalid-key requests are rejected, and the exposed operations are bounded to cross-user enumeration and metadata disclosure rather than modification.

The record

CVE
CVE-2026-50167
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Kurrier
Product
Kurrier
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=< 1.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kurrier · Kurrierversion=< 1.2.4

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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