【低危】gogs：拒绝服务风险（GHSA-4j89-2c4f-44c6）

安全情报快照 · 风险级别：低危 · CVSS：3.5 · CVE-2026-52796 · GHSA-4j89-2c4f-44c6

先看结论

gogs存在拒绝服务风险，<= 0.14.2 受影响，建议升级至 0.14.3。

影响范围

处置建议

优先将 gogs.io/gogs 升级至 0.14.3 或更高版本；升级前请结合业务依赖完成兼容性验证。

上游技术详情（原文）

Summary

Special template of issue index pattern may cause panic.

Details

in internal/markup/markup.go

link = fmt.Sprintf(`<a href="%s">%s</a>`, com.Expand(metas["format"], metas), m)

Issue index pattern is rendered to link with com.Expand.

However, com.Expand is not safe.

i = strings.Index(template, "}")
if s, ok := match[template[:i]]; ok {

when { is found but } not found, i comes to 1, template[:-1] will be called, and then panicked

finally, all pages than contains issue index are unavailable.

PoC

1. set issue index pattern as follow

1. add a commit which point to an issue in its msg

using #1 above

Impact

DoS that cause part of pages of the specify repo unavailable.

来源与许可

• GitHub Advisory GHSA-4j89-2c4f-44c6
• https://github.com/gogs/gogs/security/advisories/GHSA-4j89-2c4f-44c6
• https://github.com/gogs/gogs/pull/8312
• https://github.com/gogs/gogs/commit/0529d95fc39f2b6d2997b19a2a12e24522684722
• https://github.com/gogs/gogs/releases/tag/v0.14.3
• https://nvd.nist.gov/vuln/detail/CVE-2026-52796

本页自动同步 GitHub Advisory Database 的公开数据，并保留上游原文供核验；不宣称原创分析。数据许可：CC-BY-4.0。