CVE Watch1 sept 2026

CVE-2026-53507

oasdiff-action is a GitHub Action that detects breaking changes in OpenAPI specs and post a review on every pull request. Before version 0.0

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 31 ago 2026 · Última mod.: 1 sept 2026 · CWE-200 · CWE-918 · CWE-1188

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

oasdiff-action is a GitHub Action that detects breaking changes in OpenAPI specs and post a review on every pull request. Before version 0.0.51, the oasdiff actions resolved external $refs in the OpenAPI spec by default (allow-external-refs: true). When an action runs on a pull request whose spec is attacker-controlled — most importantly fork pull requests on public repositories — a $ref in that spec is fetched/read on the runner with no interaction required, enabling SSRF and disclosure of structured files on the runner. This issue has been patched in version 0.0.51.

Referencias oficiales

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