What’s Vulnerable › Vulnerabilities

CVE-2026-52796: Gogs: DoS in rendering issue index pattern

• Severity: low (CVSS 3.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-06-25
• Weakness: CWE-1336

Description

Gogs is an open source self-hosted Git service. Prior to 0.14.3, specially crafted issue index pattern can cause a panic when rendering, resulting in denial of service. In internal/markup/markup.go, RenderIssueIndexPattern renders the issue index pattern to a link using com.Expand, which is not safe: when the configured pattern contains an opening brace { but no closing brace }, strings.Index(template, "}") returns -1 and the subsequent slice template[:-1] triggers a panic. Once such a pattern is set, any page in the affected repository that contains an issue index reference such as #1 becomes unavailable. This vulnerability is fixed in 0.14.3.

Affected products

• gogs: before 0.14.3

References

• https://github.com/gogs/gogs/security/advisories/GHSA-4j89-2c4f-44c6
• https://github.com/gogs/gogs/security/advisories/GHSA-4j89-2c4f-44c6

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