CVEvulnerability

CVE-2026-1355

6.0 MEDIUM Published 2026-02-18 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-02-18
Last modified
2026-06-17
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.0 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-862

Description

A Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to upload unauthorized content to another user’s repository migration export due to a missing authorization check in the repository migration upload endpoint. By supplying the migration identifier, an attacker could overwrite or replace a victim’s migration archive, potentially causing victims to download attacker-controlled repository data during migration restores or automated imports. An attacker would require authentication to the victim's GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.19.2, 3.18.5, 3.17.11, 3.16.14, 3.15.18, 3.14.23. This vulnerability was reported via the GitHub Bug Bounty program.

Affected configurations

• github enterprise server (< 3.14.23) • github enterprise server (>= 3.15.0 < 3.15.18) • github enterprise server (>= 3.16.0 < 3.16.14) • github enterprise server (>= 3.17.0 < 3.17.11) • github enterprise server (>= 3.18.0 < 3.18.5) • github enterprise server (>= 3.19.0 < 3.19.2)

Related

Weakness · CWE (1)

  • CWE-862 Missing Authorization weakness

References