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Vulnerabilities

Vulnerability · CVE-2026-104636

Gitea SSRF through Git HTTP redirects in mirrors and fetches

Published Oct 14, 2026 · catalog updated Oct 14, 2026

Severity
High—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.3%
Remediation
Advisory link
Affected products
Bitnami gitea

Gitea validated the initial remote URL for push mirrors, wiki remote checks, and fetches of migrated pull request heads, but the subsequent raw Git operations followed HTTP redirects without revalidating the destination. A repository administrator using a policy-allowed endpoint that redirects could make Gitea's Git client send requests to an address that the outbound host policy would otherwise block. The impact depends on the configured policy and the internal services reachable from the server.

Technical analysis

Mechanism and impact are interpreted from ingested advisories — not independent exploit research.

  • CWE classification

    No CWE identifiers stored yet.

  • Prerequisites and impact

    Follow the original vendor advisory for access prerequisites and impact. This catalog does not invent exploit conditions.

How to fix CVE-2026-104636

What to do

Three reads of the same public record: the decision, the versions on file, and the signals. Confirm the vendor advisory before you patch. This page does not publish exploit steps.

Executive

This is a public record, not a confirmed incident. CVE-2026-104636 is a high issue in the affected product (High severity). CISA does not currently list it as known exploited. Next step: Compare installed versions with the linked vendor advisory before changing production.

System administrator

Check whether the affected product is installed. Ranges on record: gitea (0 → 28.0.0). Compare installed versions with the linked vendor advisory before changing production.

Security analyst

High severity. EPSS 0.3%. CISA does not currently list it as known exploited. Weaknesses: not classified. Sources: cve_org, epss, github, osv. Exploit links, when listed below, point at the original publisher.

Related intelligence

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · GitHub Advisory Database

    Detected

    Gitea validated the initial remote URL for push mirrors, wiki remote checks, and fetches of migrated pull request heads, but the subsequent raw Git operations followed HTTP redirects without revalidating the destination. A repository administrator using a policy-allowed endpoint that redirects could make Gitea's Git client send requests to an address that the outbound host policy would otherwise b

  2. Oct 14, 2026 · GitHub Advisory Database

    Fix available

    gitea fixed in 28.0.0

  3. Oct 14, 2026 · GitHub Advisory Database

    Fix available

    gitea fixed in 28.0.0

  4. Oct 14, 2026 · GitHub Advisory Database

    Updated

    Gitea validated the initial remote URL for push mirrors, wiki remote checks, and fetches of migrated pull request heads, but the subsequent raw Git operations followed HTTP redirects without revalidating the destination. A repository administrator using a policy-allowed endpoint that redirects could make Gitea's Git client send requests to an address that the outbound host policy would otherwise b

Affected versions

Enter an installed version to get a verified affected / not-affected result against the ranges below.

  • Bitnami gitea0 → 28.0.0

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.