GO-2026-5981None▾ SunlitEch0: ParseAcceptLanguage `_` separator bypass enables ~70x CPU amplification via Accept-Language header in i18n.Middleware in github.com/lin-snow/ech0
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
Ech0: ParseAcceptLanguage _ separator bypass enables ~70x CPU amplification via Accept-Language header in i18n.Middleware in github.com/lin-snow/ech0
github.com/lin-snow/ech0Refer to the advisory for the patched release.
Connected by shared product, vendor, weakness, or advisory.
GHSA-mqxv-9rm6-w8qcHighEch0: ParseAcceptLanguage `_` separator bypass enables ~70x CPU amplification via Accept-Language header in i18n.Middleware
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CVE-2026-79660Medium· 5.3Ech0 comment model's Email field returned on public /api/comments endpoints
CVE-2026-79668Medium· 5.3Ech0's Unauthenticated Like Endpoint Enables Arbitrary Engagement Metric Inflation
CVE-2026-79671Medium· 5.5Ech0 has SSRF via DNS Resolution Bypass in Webhook URL Validation
CVE-2026-79661Medium· 6.5Ech0 allows PUT /api/echo/like/:id unauthenticated: anonymous callers to modify any echo's fav_count