CVE-2026-118656

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Source
https://cve.org/CVERecord?id=CVE-2026-118656
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118656.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-118656
Aliases
Downstream
Published
2026-10-28T20:12:13Z
Modified
2026-10-29T10:46:09Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
Echo: Open Redirect via Control-Character Prefix Defeating sanitizeURI
Details

Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, sanitizeURI checks only the first two bytes of a redirect target before deciding whether it begins with an absolute-path separator pair. When AddTrailingSlash or RemoveTrailingSlash is configured with a redirect status, a slash, TAB, separator path form can evade the guard, be emitted in the Location header, and be normalized by a browser into an attacker-controlled host. This issue is fixed in 4.16.0 and 5.4.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-601"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118656.json"
}
References

Affected packages

Git / github.com/labstack/echo

Affected ranges

Type
GIT
Repo
https://github.com/labstack/echo
Events
Introduced
9500f2745481e2dff1313e2e6734c488e80c13fb
Fixed
fc410094b2f3415cf2bf5204082137b205bfd5af
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e75c6c6d0c99602336fcf2c6bf6c8475ee160683
Fixed
b838391e2eade87ae7e5a09d7bb5087bec271ec1
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "5.0.0"
                },
                {
                    "fixed":  "5.4.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "4.16.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "b838391e2eade87ae7e5a09d7bb5087bec271ec1"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "fc410094b2f3415cf2bf5204082137b205bfd5af"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v4.16.0",
            "range":  [
                {
                    "fixed":  "e75c6c6d0c99602336fcf2c6bf6c8475ee160683"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "v5.4.0",
            "range":  [
                {
                    "fixed":  "fc410094b2f3415cf2bf5204082137b205bfd5af"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

2.*
2.0.0-alpha
3.*
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.3.0
3.3.1
3.3.2
3.3.3
3.3.4
v0.*
v0.0.10
v0.0.11
v0.0.12
v0.0.13
v0.0.14
v0.0.15
v0.0.16
v0.0.2
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v0.0.8
v0.0.9
v1.*
v1.0.0
v1.1.0
v1.2.0
v1.3
v2.*
v2.0.0
v2.0.0-apha.1
v2.0.0-apha.2
v2.0.0-apha1
v2.0.0-beta.1
v2.0.0-beta.2
v2.0.1
v2.0.2
v3.*
v3.0.0
v3.0.0-beta.1
v3.0.0-beta.2
v3.0.1
v3.0.2
v3.0.3
v3.1.0
v3.1.0-rc.1
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5
v3.2.6
v3.3.0
v3.3.1
v3.3.10
v3.3.2
v3.3.3
v3.3.4
v3.3.5-retag
v3.3.6-retag
v3.3.7-retag
v3.3.8-retag
v3.3.9
v4.*
v4.0.0
v4.1.0
v4.1.1
v4.1.10
v4.1.11
v4.1.12
v4.1.13
v4.1.14
v4.1.15
v4.1.16
v4.1.17
v4.1.2
v4.1.3
v4.1.4
v4.1.5
v4.1.6
v4.1.7
v4.1.8
v4.1.9
v4.10.0
v4.10.1
v4.10.2
v4.11.0
v4.11.1
v4.11.2
v4.11.3
v4.11.4
v4.12.0
v4.13.0
v4.13.1
v4.13.2
v4.13.3
v4.13.4
v4.14.0
v4.15.0
v4.15.1
v4.15.2
v4.15.3
v4.15.4
v4.2.0
v4.2.1
v4.2.2
v4.3.0
v4.4.0
v4.5.0
v4.6.0
v4.6.1
v4.6.2
v4.7.0
v4.7.1
v4.7.2
v4.8.0
v4.9.0
v4.9.1
v5.*
v5.0.0
v5.0.1
v5.0.2
v5.0.3
v5.0.4
v5.1.0
v5.1.1
v5.2.0
v5.2.1
v5.3.0
v5.3.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118656.json"