5.9
MediumCVSS 3.1 · from GitHub_M
CVE-2026-118655
Echo: Static Middleware Double-Unescape Path Traversal
echo · CWE-174 · CWE-174Affectedecho
FixNo fix listed yet.
PublishedOct 28, 20:03 · GitHub_M
ScoredOct 28 · 5.9 · GitHub_M
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:10 UTC
What we know
No known exploitation. CISA KEV, checked 22:10 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
It only works under certain conditions, which makes it harder to pull off. CVSS: high attack complexity.
A successful attack can read data. CVSS impact.
Description
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.
From GitHub_M
Affected and fixed versions
ProductAffectedFixed inecho>= 5.0.0, < 5.2.0–echo< 4.15.3–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known