CVE-2026-96594 (GCVE-0-2026-96594)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:36 – Updated: 2026-10-07 15:04
VLAI
EPSS
VEX
Title
Gitea repository media API stored XSS
Summary
The Gitea API endpoint `GET /api/v1/repos/{owner}/{repo}/media/{filepath}` wrote files of up to 1 KiB that are stored directly in Git, not in LFS, to the response without the content type and disposition headers Gitea uses for user content. An HTML file committed to a repository was therefore rendered by the browser on the Gitea origin. A user who can push to a repository could run JavaScript in the session of a victim who opens the media URL and act with the victim's permissions.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:04 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/go-gitea/gitea/security/adviso… | vendor-advisory |
| https://github.com/go-gitea/gitea/pull/39501 | patch |
| https://github.com/go-gitea/gitea/pull/39507 | patch |
| https://blog.gitea.com/release-of-28.1.0/ | release-notes |
| https://github.com/go-gitea/gitea/releases/tag/v28.1.0 | release-notes |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-96594",
"options": [
{
"Exploitation": "none"
},
{
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},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-07T15:04:06.630412Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-07T15:04:26.695Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageName": "gitea.dev",
"product": "Gitea",
"vendor": "Gitea",
"versions": [
{
"lessThanOrEqual": "28.0.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/KadirArslan"
},
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/cruzzer"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/silverwind"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/bircni"
}
],
"descriptions": [
{
"lang": "en",
"value": "The Gitea API endpoint `GET /api/v1/repos/{owner}/{repo}/media/{filepath}` wrote files of up to 1 KiB that are stored directly in Git, not in LFS, to the response without the content type and disposition headers Gitea uses for user content. An HTML file committed to a repository was therefore rendered by the browser on the Gitea origin. A user who can push to a repository could run JavaScript in the session of a victim who opens the media URL and act with the victim\u0027s permissions."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
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"dateUpdated": "2026-10-06T21:36:38.491Z",
"orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"shortName": "Gitea"
},
"references": [
{
"name": "GitHub Security Advisory GHSA-94rx-fqm6-q23v",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-94rx-fqm6-q23v"
},
{
"name": "Fix: go-gitea/gitea pull request #39501",
"tags": [
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"url": "https://github.com/go-gitea/gitea/pull/39501"
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{
"name": "Fix backport to release/v28: go-gitea/gitea pull request #39507",
"tags": [
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],
"url": "https://github.com/go-gitea/gitea/pull/39507"
},
{
"name": "Gitea 28.1.0 release announcement",
"tags": [
"release-notes"
],
"url": "https://blog.gitea.com/release-of-28.1.0/"
},
{
"name": "go-gitea/gitea v28.1.0 release",
"tags": [
"release-notes"
],
"url": "https://github.com/go-gitea/gitea/releases/tag/v28.1.0"
}
],
"title": "Gitea repository media API stored XSS"
}
},
"cveMetadata": {
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"assignerShortName": "Gitea",
"cveId": "CVE-2026-96594",
"datePublished": "2026-10-06T21:36:38.491Z",
"dateReserved": "2026-10-04T22:02:04.871Z",
"dateUpdated": "2026-10-07T15:04:26.695Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"date": "2026-10-07",
"epss": "0.00174",
"percentile": "0.06285"
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"packageName": "gitea.dev",
"product": "Gitea",
"vendor": "Gitea",
"versions": [
{
"lessThanOrEqual": "28.0.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
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"source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
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"cveTags": [],
"descriptions": [
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}
],
"id": "CVE-2026-96594",
"lastModified": "2026-10-07T16:19:13.213",
"metrics": {
"cvssMetricV31": [
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"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.7,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
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"version": "2.0.3"
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"published": "2026-10-06T22:17:07.810",
"references": [
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"url": "https://github.com/go-gitea/gitea/pull/39501"
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"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "code.gitea.io/gitea: Gitea: Cross-site scripting via repository media API endpoint",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96594.json",
"version": "3"
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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