High exploit reference

CVE-2026-103687 — rhukster dom-sanitizer SVG Sanitization DOMSanitizer.php url incomplete blacklist

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.

Published Oct 1, 2026 · Updated Oct 16, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6
CISA SSVC: exploitation "poc"+5
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Rhukster

Dom-sanitizer

CVSS base

7.3

High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Rhukster Dom-sanitizer).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Rhukster	Dom-sanitizer	version 1.0.0version 1.0.1version 1.0.2version 1.0.3version 1.0.4version 1.0.5version 1.0.6version 1.0.7 and 8 more version 1.0.8version 1.0.9version 1.0.10version 1.0.11version 1.0.12version 1.0.13version 1.0.14version 1.0.15	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.9	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
5.5	CVSS 4.0	Medium	—	—	cna@vuldb.com via NIST National Vulnerability Database
7.3	CVSS 3.1	High	3.9	3.4	cna@vuldb.com via NIST National Vulnerability Database
7.3	CVSS 3.1	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP
7.3	CVSS 3.0	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP
7.5	CVSS 2.0	High	10.0	6.4	cna@vuldb.com via NIST National Vulnerability Database
7.5	CVSS 2.0	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-183

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · rhukster/dom-sanitizer
Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.3
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Oct 1, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

github.com/rhukster/dom-sanitizer/releases/tag/1.0.16
patch, NIST National Vulnerability Database
github.com/rhukster/dom-sanitizer/commit/139c46c3d7c9bc81542b7b5a58d5cde5d0e0195
patch, NIST National Vulnerability Database
github.com/rhukster/dom-sanitizer/security/advisories/GHSA-cjfg-j8jp-5xvc
exploit, NIST National Vulnerability Database
vuldb.com/submit/958345
third-party-advisory, NIST National Vulnerability Database
github.com/rhukster/dom-sanitizer/
product, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-103687
third-party-advisory, NIST National Vulnerability Database
vuldb.com/vuln/412551
vdb-entry, technical-description, NIST National Vulnerability Database
vuldb.com/vuln/412551/cti
signature, permissions-required, NIST National Vulnerability Database

Elsewhere on this site

Rhukster
every CVE for this vendor

CWE-183
other pages naming this weakness

Related CVEs (same products)

Low CVE-2026-103686 rhukster dom-sanitizer URL Validation DOMSanitizer.php isDangerousUrl cross site scripting 14d
Medium CVE-2026-100370 DOMSanitizer - Incomplete data: URL Sanitization in DOMSanitizer::isDangerousUrl() Allows Base64-Encoded Payloads to Bypass href and xlink:href Validation 17d
Medium CVE-2026-40301 rhukster/dom-sanitizer: SVG <style> tag allows CSS injection via unfiltered url() and @import directives Apr 17, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-103687 is "rhukster dom-sanitizer SVG Sanitization DOMSanitizer.php url incomplete blacklist", rated High. It affects Dom-sanitizer (Rhukster); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.3 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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