CVE-2026-70406 (GCVE-0-2026-70406)
Vulnerability from cvelistv5 – Published: 2026-10-14 14:36 – Updated: 2026-10-14 15:03
VLAI
EPSS
VEX
Title
Gitea private comparison disclosure with public-only tokens
Summary
Gitea's shared comparison helper omits the token repository-access check used when updating pull requests. A public-only token with read:repository scope can route a comparison or pull request creation through a public base repository and retrieve commit history and diffs from a private head repository accessible to the token owner. This bypasses the token's public-only restriction; it does not remove the account's underlying repository permission checks.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 14:54 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/go-gitea/gitea/security/adviso… | vendor-advisory |
| https://blog.gitea.com/release-of-1.27.3/ | release-notes |
| https://github.com/go-gitea/gitea/pull/39006 | patch |
| https://github.com/go-gitea/gitea/pull/39013 | patch |
| https://github.com/go-gitea/gitea/releases/tag/v1.27.3 | release-notes |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-70406",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-14T14:54:29.357945Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-14T15:03:17.796Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageName": "code.gitea.io/gitea",
"product": "Gitea",
"vendor": "Gitea",
"versions": [
{
"lessThanOrEqual": "1.27.2",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/qw3rtyou"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/bircni"
},
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/ohxorud-dev"
}
],
"descriptions": [
{
"lang": "en",
"value": "Gitea\u0027s shared comparison helper omits the token repository-access check used when updating pull requests. A public-only token with read:repository scope can route a comparison or pull request creation through a public base repository and retrieve commit history and diffs from a private head repository accessible to the token owner. This bypasses the token\u0027s public-only restriction; it does not remove the account\u0027s underlying repository permission checks."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863: Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-14T14:36:53.729Z",
"orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"shortName": "Gitea"
},
"references": [
{
"name": "GitHub Security Advisory GHSA-m78w-jjjx-gp8r",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-m78w-jjjx-gp8r"
},
{
"name": "Gitea 1.27.3 release announcement",
"tags": [
"release-notes"
],
"url": "https://blog.gitea.com/release-of-1.27.3/"
},
{
"name": "Fix: go-gitea/gitea pull request #39006",
"tags": [
"patch"
],
"url": "https://github.com/go-gitea/gitea/pull/39006"
},
{
"name": "Fix: go-gitea/gitea pull request #39013",
"tags": [
"patch"
],
"url": "https://github.com/go-gitea/gitea/pull/39013"
},
{
"name": "go-gitea/gitea v1.27.3 release",
"tags": [
"release-notes"
],
"url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.3"
}
],
"title": "Gitea private comparison disclosure with public-only tokens"
}
},
"cveMetadata": {
"assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"assignerShortName": "Gitea",
"cveId": "CVE-2026-70406",
"datePublished": "2026-10-14T14:36:53.729Z",
"dateReserved": "2026-08-13T16:50:58.706Z",
"dateUpdated": "2026-10-14T15:03:17.796Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-70406",
"date": "2026-10-15",
"epss": "0.00341",
"percentile": "0.26019"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"packageName": "code.gitea.io/gitea",
"product": "Gitea",
"vendor": "Gitea",
"versions": [
{
"lessThanOrEqual": "1.27.2",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Gitea\u0027s shared comparison helper omits the token repository-access check used when updating pull requests. A public-only token with read:repository scope can route a comparison or pull request creation through a public base repository and retrieve commit history and diffs from a private head repository accessible to the token owner. This bypasses the token\u0027s public-only restriction; it does not remove the account\u0027s underlying repository permission checks."
}
],
"id": "CVE-2026-70406",
"lastModified": "2026-10-14T16:17:52.077",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-70406",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-14T14:54:29.357945Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-10-14T15:17:22.570",
"references": [
{
"source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"url": "https://blog.gitea.com/release-of-1.27.3/"
},
{
"source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"url": "https://github.com/go-gitea/gitea/pull/39006"
},
{
"source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"url": "https://github.com/go-gitea/gitea/pull/39013"
},
{
"source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.3"
},
{
"source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-m78w-jjjx-gp8r"
}
],
"sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-863"
}
],
"source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-70406",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-14T14:54:29.357945Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-14T14:54:26.235Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageName": "code.gitea.io/gitea",
"product": "Gitea",
"vendor": "Gitea",
"versions": [
{
"lessThanOrEqual": "1.27.2",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/qw3rtyou"
},
{
"lang": "en",
"type": "remediation developer",
"value": "https://github.com/bircni"
},
{
"lang": "en",
"type": "reporter",
"value": "https://github.com/ohxorud-dev"
}
],
"descriptions": [
{
"lang": "en",
"value": "Gitea\u0027s shared comparison helper omits the token repository-access check used when updating pull requests. A public-only token with read:repository scope can route a comparison or pull request creation through a public base repository and retrieve commit history and diffs from a private head repository accessible to the token owner. This bypasses the token\u0027s public-only restriction; it does not remove the account\u0027s underlying repository permission checks."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863: Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-14T14:36:53.729Z",
"orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"shortName": "Gitea"
},
"references": [
{
"name": "GitHub Security Advisory GHSA-m78w-jjjx-gp8r",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-m78w-jjjx-gp8r"
},
{
"name": "Gitea 1.27.3 release announcement",
"tags": [
"release-notes"
],
"url": "https://blog.gitea.com/release-of-1.27.3/"
},
{
"name": "Fix: go-gitea/gitea pull request #39006",
"tags": [
"patch"
],
"url": "https://github.com/go-gitea/gitea/pull/39006"
},
{
"name": "Fix: go-gitea/gitea pull request #39013",
"tags": [
"patch"
],
"url": "https://github.com/go-gitea/gitea/pull/39013"
},
{
"name": "go-gitea/gitea v1.27.3 release",
"tags": [
"release-notes"
],
"url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.3"
}
],
"title": "Gitea private comparison disclosure with public-only tokens"
}
},
"cveMetadata": {
"assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
"assignerShortName": "Gitea",
"cveId": "CVE-2026-70406",
"datePublished": "2026-10-14T14:36:53.729Z",
"dateReserved": "2026-08-13T16:50:58.706Z",
"dateUpdated": "2026-10-14T15:03:17.796Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
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.
Loading…
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.