redirect/2 validates :to through the private validate_local_url!/2 in lib/phoenix_live_view.ex, which is intended to guarantee the target is a path within the application. It rejects a leading // and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as /<TAB>/example.com passes validation as a path and is then resolved as the scheme-relative URL //example.com. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. push_patch/2 is also affected before 0.7.0, which is when that expansion was added.
This issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9.
No advisories yet.
Solution
No solution given by the vendor.
Workaround
Reject any untrusted value containing ASCII tab, LF or CR before passing it as :to to redirect/2, or to push_patch/2 before 0.7.0. Alternatively, map client-supplied navigation targets to a fixed set of known-good paths rather than forwarding the value.
Mon, 10 Aug 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Mon, 10 Aug 2026 11:30:00 +0000
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| Description | URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a :to value containing ASCII tab, LF or CR. redirect/2 validates :to through the private validate_local_url!/2 in lib/phoenix_live_view.ex, which is intended to guarantee the target is a path within the application. It rejects a leading // and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as /<TAB>/example.com passes validation as a path and is then resolved as the scheme-relative URL //example.com. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. push_patch/2 is also affected before 0.7.0, which is when that expansion was added. This issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9. | |
| Title | Open redirect in Phoenix.LiveView.validate_local_url!/2 via ASCII tab, LF and CR | |
| First Time appeared |
Phoenixframework
Phoenixframework phoenix Live View |
|
| Weaknesses | CWE-601 | |
| CPEs | cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Phoenixframework
Phoenixframework phoenix Live View |
|
| References |
|
|
| Metrics |
cvssV4_0
|
Projects
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Status: PUBLISHED
Assigner: EEF
Published:
Updated: 2026-08-10T13:00:33.543Z
Reserved: 2026-08-09T16:30:01.572Z
Link: CVE-2026-64941
Updated: 2026-08-10T13:00:29.061Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-08-10T13:00:04Z