Vulnerability from bitnami_vulndb
Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "gitea",
"purl": "pkg:bitnami/gitea"
},
"ranges": [
{
"events": [
{
"introduced": "1.16.0"
},
{
"fixed": "1.27.2"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2026-73278"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*"
],
"severity": "Critical"
},
"details": "Gitea\u0027s OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account\u0027s only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario.",
"id": "BIT-gitea-2026-73278",
"modified": "2026-10-14T09:12:20.145Z",
"published": "2026-10-14T08:43:01.032Z",
"references": [
{
"type": "ARTICLE",
"url": "https://blog.gitea.com/release-of-1.27.2/"
},
{
"type": "FIX",
"url": "https://github.com/go-gitea/gitea/pull/38805"
},
{
"type": "FIX",
"url": "https://github.com/go-gitea/gitea/pull/38810"
},
{
"type": "ARTICLE",
"url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.2"
},
{
"type": "ADVISORY",
"url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73278"
}
],
"schema_version": "1.6.2",
"summary": "Gitea WebAuthn bypass during OAuth and OIDC sign-in"
}
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.
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…
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.
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.