CVE-2026-103667 json
Gitea container registry stored XSS through blob media type
published last mo. modified 24d ago also BIT-gitea-2026-103667 , EUVD-2026-93910 , GHSA-7cq7-4v93-8wjm
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
Gitea's container registry served blob downloads with a `Content-Type` taken from the media type declared in pushed image manifests, without a `Content-Disposition` or restrictive content security policy. A user who can push container images can publish a blob containing HTML and JavaScript with a `text/html` media type. When a victim who is authenticated to the instance opens the blob URL in a browser, the script runs on the Gitea origin and can perform actions as the victim, such as creating API tokens.
Patch / fix
- bitnami gitea 28.0.0
- gitea gitea 28.0.0
- github.com/go-gitea/gitea#39398 pull request
- github.com/go-gitea/gitea/releases/tag/v28.0.0 release
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitea | <28.0.0 |
28.0.0 |
Affected products
- Gitea Gitea
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/go-gitea/gitea/pull/39398
patch, issue-tracking
-
github.com
/go-gitea/gitea/security/advisories/GHSA-7cq7-4v93-8wjm
vendor-advisory, mitigation, advisory
-
blog.gitea.com
/release-of-28.0.0/
release-notes, article
-
github.com
/go-gitea/gitea/releases/tag/v28.0.0
release-notes, article
-
nvd.nist.gov
/vuln/detail/CVE-2026-103667
web
Sources
- CVE List CVE-2026-103667
- NVD CVE-2026-103667
- OSV BIT-gitea-2026-103667
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