Double Decoding of the Same Data Affecting golang-github-labstack-echo package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 Oct 2026
- disclosed28 Oct 2026
Introduced: 28 Oct 2026
NewCVE-2026-118655 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest golang-github-labstack-echo.
NVD Description
Note: Versions mentioned in the description apply only to the upstream golang-github-labstack-echo package and not the golang-github-labstack-echo package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, middleware.Static can decode an already decoded Request.URL.Path a second time. Double-encoded separators can consequently be reconstructed before filesystem resolution. This can reach a file under a guarded route when the static middleware is registered globally. This issue is fixed in 4.15.3 and 5.2.0.
References
- https://advisory.echohq.com/cve/CVE-2026-118655
- https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6
- https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725
- https://github.com/labstack/echo/issues/2599
- https://github.com/labstack/echo/pull/3006
- https://github.com/labstack/echo/releases/tag/v4.15.3
- https://github.com/labstack/echo/releases/tag/v5.2.0
- https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96