Medium · CVSS 6.9CVE-2026-103687

rhukster dom-sanitizer SVG Sanitization DOMSanitizer.php url incomplete blacklist

Answer in brief

CVE-2026-103687 records a Medium severity (CVSS 6.9) vulnerability in rhukster dom-sanitizer SVG Sanitization DOMSanitizer.php url incomplete blacklist. The current sources do not mark it as known exploited. The current feed maps rhukster/dom-sanitizer (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 Oct 1, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.9. 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 rhukster/dom-sanitizer (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rhukster/dom-sanitizergeneric	1.0.0 \|\| 1.0.1 \|\| 1.0.2 \|\| 1.0.3 \|\| 1.0.4 \|\| 1.0.5 \|\| 1.0.6 \|\| 1.0.7 \|\| 1.0.8 \|\| 1.0.9 \|\| 1.0.10 \|\| 1.0.11 \|\| 1.0.12 \|\| 1.0.13 \|\| 1.0.14 \|\| 1.0.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for rhukster/dom-sanitizer.
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
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 1, 2026

Sources and claim methodology

Upstream source description

A vulnerability has been found in rhukster dom-sanitizer up to 1.0.15. The affected element is the function url of the file src/DOMSanitizer.php of the component SVG Sanitization. Such manipulation leads to incomplete blacklist. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.0.16 is sufficient to fix this issue. The name of the patch is 139c46c3d7c9bc81542b7b5a58d5cde5d0e0195a. Upgrading the affected component is recommended.

Quoted source text, attributed separately from HOL analysis.