CVE-2026-58314
Description
A flaw was found in Gitea. This vulnerability, known as Server-Side Request Forgery (SSRF), allows an attacker to trick the server into making requests to internal network resources. A logged-in user can exploit this by crafting malicious webhooks or repository migration configurations, leading to the disclosure of sensitive information from internal hosts. Additionally, if OpenID sign-in is enabled, an unauthenticated attacker can trigger blind GET requests to internal IPs through the OpenID discovery process, which can be used for internal network reconnaissance.
Statement
A flaw in Gitea's URL parsing logic allows both authenticated users (via webhooks or repository migrations) and unauthenticated users (via OpenID discovery) to trigger HTTP GET requests to internal endpoints. By manipulating these parameters, an attacker can bypass boundary controls to perform Server-Side Request Forgery (SSRF), allowing internal network reconnaissance and disclosure of sensitive information from internal hosts.
Mitigation
To mitigate unauthenticated internal network probes, disable OpenID sign-in by setting `ENABLE_OPENID_SIGNIN = false` in app.ini. To limit SSRF risks from webhooks and repository migrations, configure `ALLOWED_HOST_LIST` to explicitly restrict webhooks to trusted external domains or block private IP ranges.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.6 | N/A | 7.7 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Changed | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Integrity
Technical Impact: Execute Unauthorized Code or Commands
Access Control
Technical Impact: Bypass Protection Mechanism
By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
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