CVE-2023-50728: Unauthenticated Denial of Service in the octokit/webhooks library

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-15 · updated 2026-06-17
Weakness: CWE-755

Description

octokit/webhooks is a GitHub webhook events toolset for Node.js. Starting in 9.26.0 and prior to 9.26.3, 10.9.2, 11.1.2, and 12.0.4, there is a problem caused by an issue with error handling in the @octokit/webhooks library because the error can be undefined in some cases. The resulting request was found to cause an uncaught exception that ends the nodejs process. The bug is fixed in octokit/webhooks.js 9.26.3, 10.9.2, 11.1.2, and 12.0.4, app.js 14.02, octokit.js 3.1.2, and Protobot 12.3.3.

Affected products

octokit App: 14.0.1
Octokit: before 3.1.2 — fixed in 3.1.2
octokit Webhooks: before 9.26.3; from 10.0.0 before 10.9.2; from 11.0.0 before 11.1.2; from 12.0.0 before 12.0.4 — fixed in 10.9.2, 11.1.2, 12.0.4, 9.26.3
Probot: before 12.3.3 — fixed in 12.3.3

How to fix

Upgrade to a fixed version: Octokit 3.1.2; octokit Webhooks 10.9.2, 11.1.2, 12.0.4, 9.26.3; Probot 12.3.3. Check the vendor advisory for mitigations.

References

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