CVE-2026-118655

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 62/100
Published: 2026-10-28 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Unchanged
C: High
I: None
A: None

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.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
labstack echo >= 5.0.0, < 5.2.0
labstack echo < 4.15.3
labstack echo >= 5.0.0, < 5.2.0
labstack echo < 4.15.3

Bug Bounty Relevance

62 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

5.9 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.30%
Raw Score 0.003030
Percentile 23.1%
Date 2026-10-29

Intelligence Sources

mitre ref →
nvd ref →