Cotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() Regex (CVE-2026-93869) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93869

Cotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() Regex

Answer in brief

CVE-2026-93869 records a Unknown severity vulnerability in Cotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() Regex. The current sources do not mark it as known exploited. The current feed maps Cotonti/Cotonti (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 18, 2026Updated Sep 18, 2026Source checked Sep 19, 2026First seen by HOL Sep 18, 2026Material review Sep 18, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Cotonti/Cotonti (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Cotonti/Cotontigeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Cotonti/Cotonti.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 18, 2026

Sources and claim methodology

Upstream source description

Cotonti through 1.0.0 contains an open redirect vulnerability in the cot_url_check() function that validates redirect destinations using a regular expression lacking an end-of-string anchor. Attackers can bypass the redirect guard by supplying hostnames beginning with the site domain to redirect users to attacker-controlled hosts through the ratings plugin or other redirect callers.

Quoted source text, attributed separately from HOL analysis.