GHSA-hgr3-x44x-33hx BIT-gitea-2026-20736 CVE-2026-20736 GHSA-jr6h-pwwp-c8g6 GO-2026-4367
Gitea has improper access control for uploaded attachments
- Severity
- 0.0 / 10
- High · CVSS 4.0
- Exploit chance (EPSS)
- 0.43%
- Chance of exploitation in the next 30 days. Higher than 37.61% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-284 Improper Access Control
- Fix
1.25.4- Upgrade code.gitea.io/gitea to this version or later
Description
Gitea does not properly verify repository context when deleting attachments. A user who previously uploaded an attachment to a repository may be able to delete it after losing access to that repository by making the request through a different repository they can access.
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| code.gitea.io/gitea | < 1.25.4 |
1.25.4 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
code.gitea.io/gitea Go → 1.25.4
- go
go get code.gitea.io/gitea@v1.25.4 && go mod tidy
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- Present
- Privileges required
- Low
- User interaction
- None
- Confidentiality (vulnerable system)
- None
- Integrity (vulnerable system)
- None
- Availability (vulnerable system)
- Low
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
CVSS 3.1 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Weakness
CWE-284: Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
How to prevent it
- Architecture and Design, Operation: Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Architecture and Design: Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References
Advisories
Packages
Other links
- github.com/go-gitea/gitea/pull/36320
- github.com/go-gitea/gitea/commit/fbea2c68e8df11cfa94e8ead913b79946780ed30
- blog.gitea.com/release-of-1.25.4
- github.com/go-gitea/gitea/releases/tag/v1.25.4
- blog.gitea.com/release-of-1.25.4
- github.com/go-gitea/gitea/security/advisories/GHSA-jr6h-pwwp-c8g6
- access.redhat.com/security/cve/CVE-2026-20736
- bugzilla.redhat.com/show_bug.cgi
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20736.json
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-rcr6-4jqh-j84m Gitea: Remote Code Execution via diffpatch Git Hook Installation | Critical Known exploited | Also affects code.gitea.io/gitea |
| GHSA-fq2p-5p22-8g6j Gitea: Public-Only Personal access tokens scope bypass in Organization and Permission Endpoints | Medium | Also affects code.gitea.io/gitea |
| GHSA-2wm4-vwp6-v7xc Gitea: SSRF via Migration Asset Downloads Bypasses hostmatcher — Reads Internal Files and Cloud Metadata | High | Also affects code.gitea.io/gitea |
| GHSA-3r5c-2xxx-h872 Gitea: Webhook Authorization Header Returned in Plaintext via API | Low | Also affects code.gitea.io/gitea |
| GHSA-frpw-3h2q-4jj6 Gitea: Cross-Repo Information Disclosure via Org-Level Actions Run/Job APIs | Medium | Also affects code.gitea.io/gitea |
| GHSA-q423-49rw-g9mh Gitea: GHSA-8fwc-qjw5-rvgp ClearRepoWatches fix not applied to API EditRepo path — sister code path retains stale watches on public->private | Medium | Also affects code.gitea.io/gitea |
| GHSA-2fcr-jfvc-vgg2 Gitea: Two SSRF findings | High | Also affects code.gitea.io/gitea |
| GHSA-fw57-jgch-pgf3 Gitea: ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests | High | Also affects code.gitea.io/gitea |
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