Security readout for executives and security teams
Plain-English summary
CVE-2026-58443 is a critical Gitea authorization issue. A token meant only for public repositories may be able to update private pull-request head branches. That creates business risk around unauthorized code changes in private development workflows. No source provided confirms active exploitation.
Executive priority
Treat as urgent for Gitea environments supporting private code repositories. The main risk is unauthorized modification of private development branches, which can affect software integrity and release trust. Prioritize validation and vendor-guided remediation.
Technical view
The issue is classified as CWE-863, incorrect authorization. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H, score 9.1. Sources describe public-only repository tokens being able to update private PR head branches. The provided affected-version data is sparse and should be verified against Gitea’s advisory.
Likely exposure
Exposure is most relevant to organizations running Gitea and using pull-request workflows involving private repositories and repository-scoped tokens. The source bundle does not provide a clear affected version range beyond references to Gitea’s advisory and v1.27.0 release materials.
Exploitation context
The CVSS vector indicates remote, low-complexity exploitation with no privileges or user interaction required. CISA KEV status is false in the provided data, and no cited source states active exploitation. Do not assume internet-wide exploitation without further evidence.
Researcher notes
The public bundle has limited affected-version detail and lists affected version data as “0” with defaultStatus “unaffected,” which appears insufficient for exposure decisions. Use the GitHub Security Advisory and Gitea release notes as authoritative sources before concluding impact.
Mitigation direction
- Review the Gitea GitHub Security Advisory for affected versions and official remediation.
- Prioritize vendor-recommended upgrading; v1.27.0 release materials are cited in the source bundle.
- Limit use of public-only repository tokens until remediation is confirmed.
- Review and rotate relevant tokens if unauthorized branch updates are suspected.
Validation and detection
- Inventory all Gitea instances and versions.
- Compare deployed versions against the Gitea advisory.
- Identify workflows using public-only repository tokens with private pull requests.
- Review audit logs for unexpected private PR head branch updates.
- Confirm remediation using vendor release or advisory guidance.
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-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2026-58443 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:N/I:H/A:H
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:N/I:H/A:H3.95.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.