CVE-2025-71405

go-chi chi before v5.2.2 Open Redirect via RedirectSlashes

MEDIUM
5.1
CVSS Score
Published: August 14, 2026 at 11:35 AM UTC
Updated: October 8, 2026 at 04:16 PM UTC
1 product affected across 1 vendorChi

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Severity
MEDIUM5.1
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

chi versions before v5.2.2 contain an open redirect vulnerability in the RedirectSlashes middleware function that uses the Host header to construct redirect URLs. Attackers can manipulate the Host header to redirect users to arbitrary hosts, enabling phishing attacks and credential theft.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0 ≤ v < 5.2.20
Vendor states this is fixed in 5.2.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.1MEDIUMVulnCheck
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-601

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