PT-2026-54645 · Github · Enterprise Server

Ahacker1 · Publicado 2026-07-01 · Atualizado 2026-07-01 · CVE-2026-14340

Mitre

CVSS v4.0

5.3

Média

Vetor base

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

An incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed a user-to-server token scoped to a GitHub App installation to perform certain write operations on public repositories outside the token's intended scope. This was possible because the authorization check only verified that the installation had read permissions on the target repository rather than verifying that the token's installation was explicitly granted access to that repository. An attacker who obtained a victim's user-to-server token could create issues, issue comments, commit comments, and private vulnerability reports on any public repository, appearing as the victim user with no indication of the app involvement. This vulnerability was fixed by adding a repository scope check for user-to-server tokens issued by global apps. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.21.2, 3.20.4, 3.19.8, 3.18.11, 3.17.17, 3.16.20. This vulnerability was reported via the GitHub Bug Bounty program.

Correção

Incorrect Authorization

Enumeração de Fraquezas

CWE-863

Identificadores relacionados

CVE-2026-14340

Produtos afetados

Enterprise Server

Referências · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-14340 · Nota de Segurança
• https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8 · Nota
• https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17 · Nota
• https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11 · Nota
• https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4 · Nota
• https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.20 · Nota
• https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.2 · Nota