redirect decodes HTML entities in its URL before writing the Location header, so a URL the application has already validated can change meaning. For example, //evil.example/ becomes //evil.example/ and sends the user to another host.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
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Project Subscriptions
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No advisories yet.
Solution
Upgrade to CGI 5.00 or later.
Workaround
For deployments that cannot upgrade, reject redirect URLs that HTML entity decoding would change.
Wed, 04 Nov 2026 00:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | CGI versions before 5.00 for Perl allow open redirects via HTML entity decoding of the URL after application validation in redirect. redirect decodes HTML entities in its URL before writing the Location header, so a URL the application has already validated can change meaning. For example, //evil.example/ becomes //evil.example/ and sends the user to another host. | |
| Title | CGI versions before 5.00 for Perl allow open redirects via HTML entity decoding of the URL after application validation in redirect | |
| Weaknesses | CWE-180 CWE-601 |
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| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-11-03T23:40:27.142Z
Reserved: 2026-11-02T17:40:51.554Z
Link: CVE-2026-120638
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-11-04T00:17:25.137
Modified: 2026-11-04T00:17:25.137
Link: CVE-2026-120638
Redhat
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OpenCVE Enrichment
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