CVE-2026-118264
- Source
- https://cve.org/CVERecord?id=CVE-2026-118264
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118264.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-118264
- Aliases
- Downstream
- Published
- 2026-10-28T19:03:01Z
- Modified
- 2026-10-29T10:46:09Z
- Severity
-
- 9.1 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Echo: Rejected WebSocket upgrades can bypass Echo route-level access controls
- Details
-
Echo is a Go web framework. From 4.0.0 until 4.16.1 and 5.4.1, Echo's Proxy middleware selects a raw tunnel from a client WebSocket upgrade request before verifying that the configured upstream accepted the upgrade. If the upstream rejects the upgrade with an ordinary keep-alive response, later HTTP requests on the connection are sent directly to that upstream without passing through Echo's router or route-specific middleware. This can bypass authentication or authorization enforced only by Echo routes, but requires an accessible proxy route, a cooperating rejected-upgrade response, and a target without independent upstream authorization. This issue is fixed in 4.16.1 and 5.4.1.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-444", "CWE-863" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118264.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118264.json
- https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec
- https://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f
- https://github.com/labstack/echo/releases/tag/v4.16.1
- https://github.com/labstack/echo/releases/tag/v5.4.1
- https://github.com/labstack/echo/security/advisories/GHSA-cxf3-9h37-7rr8
- https://nvd.nist.gov/vuln/detail/CVE-2026-118264
Affected packages
Git / github.com/labstack/echo
Affected ranges
- Type
- GIT
- Repo
- https://github.com/labstack/echo
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "4.0.0" }, { "fixed": "4.16.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "5.0.0" }, { "fixed": "5.4.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "1855061e572ae9dab727c811d8382f266bfbaaec" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "3fb0ba7e17645bb65611e2a08875d0a2f65c421f" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v4.16.1", "range": [ { "fixed": "600b9855dfbcb22c7e643e43ce397d5248e882b2" } ], "source": "REFERENCES_TAG" }, { "original_tag": "v5.4.1", "range": [ { "fixed": "a6a9673a54d2c719ceb32ce6a929d35483acfb2b" } ], "source": "REFERENCES_TAG" } ] }
Affected versions
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
v4.16.0
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
v5.4.0