PT-2026-51456 · Go · Gogs.Io/Gogs
Publicado
2026-06-22
·
Atualizado
2026-06-22
·
CVE-2026-52796
CVSS v3.1
3.5
Baixa
| Vetor | AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L |
Summary
Special template of issue index pattern may cause panic.
Details
in internal/markup/markup.go
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.go
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
- set issue index pattern as follow
- add a commit which point to an issue in its msg
using
#1 aboveImpact
DoS that cause part of pages of the specify repo unavailable.
Correção
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Gogs.Io/Gogs