CVE-2026-89430 (GCVE-0-2026-89430)
Vulnerability from cvelistv5 – Published: 2026-10-06 19:23 – Updated: 2026-10-07 20:16
VLAI
EPSS
VEX
Title
Gitea push mirror SSRF and forced writes to internal Git hosts
Summary
Gitea validated a push mirror's remote address against the `[migrations]` allow and block lists only when the mirror was created. Each synchronization passed the stored address directly to `git push`, so a name that later resolved to a blocked or internal address was still reached. A user with administrator access to a repository, which includes repositories they create themselves, could aim push mirror synchronization at internal Git services and force-push the repository's contents to them.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 20:15 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/go-gitea/gitea/security/adviso… | vendor-advisory |
| https://github.com/go-gitea/gitea/pull/39010 | patch |
| https://github.com/go-gitea/gitea/pull/39426 | patch |
| https://blog.gitea.com/release-of-28.0.0/ | release-notes |
| https://github.com/go-gitea/gitea/releases/tag/v28.0.0 | release-notes |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-89430",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-07T20:15:42.946496Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-07T20:16:04.169Z",
"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": "1.27.3",
"status": "affected",
"version": "0",
"versionType": "semver"
}
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"credits": [
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/thesmartshadow"
},
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/manus-use"
},
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/cy3erm"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/TheFox0x7"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/silverwind"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/bircni"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/wxiaoguang"
}
],
"descriptions": [
{
"lang": "en",
"value": "Gitea validated a push mirror\u0027s remote address against the `[migrations]` allow and block lists only when the mirror was created. Each synchronization passed the stored address directly to `git push`, so a name that later resolved to a blocked or internal address was still reached. A user with administrator access to a repository, which includes repositories they create themselves, could aim push mirror synchronization at internal Git services and force-push the repository\u0027s contents to them."
}
],
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{
"cweId": "CWE-367",
"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
},
{
"cweId": "CWE-918",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"lang": "en",
"type": "CWE"
}
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}
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"dateUpdated": "2026-10-06T19:23:52.198Z",
"orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
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{
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"tags": [
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{
"name": "Fix: go-gitea/gitea pull request #39426",
"tags": [
"patch"
],
"url": "https://github.com/go-gitea/gitea/pull/39426"
},
{
"name": "Gitea 28.0.0 release announcement",
"tags": [
"release-notes"
],
"url": "https://blog.gitea.com/release-of-28.0.0/"
},
{
"name": "go-gitea/gitea v28.0.0 release",
"tags": [
"release-notes"
],
"url": "https://github.com/go-gitea/gitea/releases/tag/v28.0.0"
}
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"title": "Gitea push mirror SSRF and forced writes to internal Git hosts"
}
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"percentile": "0.0157"
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"status": "affected",
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}
],
"id": "CVE-2026-89430",
"lastModified": "2026-10-07T21:17:21.197",
"metrics": {
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"attackVector": "NETWORK",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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"title": "Gitea push mirror SSRF and forced writes to internal Git hosts"
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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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