Security readout for executives and security teams
Plain-English summary
Gitea 1.26.2 may return identity information through its OIDC userinfo endpoint even when an API token lacks the required scopes. This can expose sensitive identity claims and undermine identity-related trust decisions. The supplied record rates the issue critical but does not identify the exact claims exposed.
Executive priority
Treat confirmed Gitea 1.26.2 deployments as an urgent remediation priority, especially when externally reachable or integrated with important identity workflows. Escalate promptly, while avoiding claims of active exploitation unsupported by the supplied evidence.
Technical view
The OIDC userinfo endpoint fails to enforce API-token scopes before returning identity claims, classified as CWE-200. CVSS 3.1 scores it 9.1: network-accessible, low complexity, no privileges or user interaction, with high confidentiality and integrity impact but no availability impact.
Likely exposure
Based on the supplied record, exposure concerns Gitea Open Source Git Server 1.26.2, particularly where the OIDC userinfo endpoint is network-reachable and API tokens are used. The bundle marks other versions unaffected by default but provides no configuration-specific applicability details.
Exploitation context
The CVSS assessment indicates remote, low-complexity exploitation without user interaction. However, CISA KEV status is false, and the supplied sources provide no evidence of active exploitation, public proof-of-concept code, or observed attacks.
Researcher notes
The bundle does not specify exposed claim types, affected configurations, root cause, fixed commit, or a definitive corrected version. Although 1.27.0 release references are supplied, explicit confirmation that it fixes this CVE is absent from the bundle; verify against the vendor advisory.
Mitigation direction
- Inventory Gitea deployments and urgently identify instances running version 1.26.2.
- Review the vendor advisory for confirmed remediation and configuration guidance.
- Consult the Gitea 1.27.0 release materials before selecting an upgrade target.
- Apply the vendor-confirmed correction using established change and rollback procedures.
Validation and detection
- Confirm deployed Gitea versions using trusted inventory or administrative records.
- Determine whether affected instances expose the OIDC userinfo endpoint.
- Review relevant logs for unexpected or unauthorized userinfo endpoint access.
- After remediation, verify tokens lacking required scopes cannot retrieve protected identity claims.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-55982 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N3.95.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- GitHub Security AdvisoryCVE reference, Gitea · vendor-advisory
- Gitea v1.27.0 ReleaseCVE reference, Gitea · release-notes
- Gitea v1.27.0 Release Blog PostCVE reference, Gitea · release-notes
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.