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CVE-2026-20706
Published:June 17, 2026
Updated:June 18, 2026
Summary PR #37698 added checkDownloadTokenScope to /raw/, /media/, and attachment download web endpoints. The /archive/* endpoint (repo.Download in routers/web/repo/repo.go:372) was not included in the fix. This endpoint accepts OAuth2 tokens via webAuth.AllowOAuth2 (registered at routers/web/web.go:1649-1652) but does not call checkDownloadTokenScope or CheckRepoScopedToken. A personal access token with any non-repository scope (e.g., read:issue or read:misc) can download full repository archives (zip/tar.gz) of private repositories the token owner has access to. Impact Scope escalation: tokens scoped to non-repository categories can access full repository content through the archive download endpoint. Higher impact than endpoints fixed in #37698 because /archive/* serves the entire repository. Steps to Reproduce 1. Create a personal access token with ONLY read:misc scope 2. Access: GET /{owner}/{private-repo}/archive/main.tar.gz 3. Archive is served (200 OK) instead of being rejected (403 Forbidden) Compare with fixed endpoints: - GET /{owner}/{private-repo}/raw/branch/main/README.md correctly returns 403 Root Cause Download function in routers/web/repo/repo.go:372 does not call checkDownloadTokenScope. The outer group middleware reqUnitCodeReader checks repository permission but not token scope. The API equivalent (/api/v1/repos/{owner}/{repo}/archive/*) IS properly scoped via tokenRequiresScopes(AccessTokenScopeCategoryRepository). The git HTTP endpoints are scoped via CheckRepoScopedToken in httpBase. Suggested Fix Add checkDownloadTokenScope(ctx) to Download and InitiateDownload in routers/web/repo/repo.go. The function already exists in routers/web/repo/download.go (same package). Discovery Method Variant analysis of PR #37698 — reviewed all web routes with webAuth.AllowOAuth2 middleware.
Affected Packages
https://github.com/go-gitea/gitea.git (GITHUB):
Affected version(s) >=v0.9.99 <v1.26.2
Fix Suggestion:
Update to version v1.26.2
code.gitea.io/gitea (GO):
Affected version(s) >=v0.0.0-20150810145912-2aea247208d4 <v1.26.2
Fix Suggestion:
Update to version v1.26.2
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization