Bug 2493622 (CVE-2026-55677)

Summary:	CVE-2026-55677 github.com/labstack/echo: Echo: Unauthorized Information Disclosure via URL Path Decoding Discrepancy
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	amctagga, aoconnor, asyoung, bniver, dfreiber, dkeler, drow, flucifre, gbenhaim, gmeno, gparvin, groman, jbalunas, jburrell, jhollowa, jsamir, jsherril, kaycoth, kgaikwad, lchilton, mbenjamin, mhackett, mkleinhe, niyer, prichard, rhaigner, rhel-process-autobot, rochandr, sfeifer, sostapov, sthirugn, suppawar, thason, tsze, twaugh, vereddy, vkumar, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in Echo, a Go web framework. An attacker can exploit a disagreement in URL path decoding between the router and the static file handler. The router processes raw encoded paths, while the static file handler unescapes encoded forward slashes. This allows an attacker to bypass route-level access controls, leading to unauthorized information disclosure by reading static files.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2506241, 2506242, 2506243, 2506261, 2506262, 2506263, 2506264, 2506265
Bug Blocks:

Description OSIDB Bzimport 2026-06-26 17:02:08 UTC

Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo's router and static file handler disagree on URL path decoding. The router matches routes using the raw encoded path (preserving %2F as-is), while StaticDirectoryHandler unescapes %2F to / before resolving filesystem paths. This allows an attacker to bypass route-level access controls and read static files without authorization. This vulnerability is fixed in 4.15.3 and 5.2.0.

Comment 5 errata-xmlrpc 2026-08-20 14:34:43 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:57541 https://access.redhat.com/errata/RHSA-2026:57541

Comment 6 errata-xmlrpc 2026-08-31 14:24:36 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:61585 https://access.redhat.com/errata/RHSA-2026:61585

Comment 7 errata-xmlrpc 2026-09-03 09:17:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:63134 https://access.redhat.com/errata/RHSA-2026:63134

Comment 8 errata-xmlrpc 2026-09-10 15:01:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:66432 https://access.redhat.com/errata/RHSA-2026:66432

Comment 9 Jon Orris 2026-09-14 13:32:23 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:67148 https://access.redhat.com/errata/RHSA-2026:67148

Comment 10 Jon Orris 2026-09-21 17:02:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:69293 https://access.redhat.com/errata/RHSA-2026:69293