CVE-2026-103687

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-10-01. A secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.3
EG Score
7.3HIGHhigh confidence
EG Risk
38
EG Risk 38/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity73% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 1, 2026

Last Modified

October 1, 2026

Advisory Details (4)

Auto-updated Oct 1, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
generic

GitHub - rhukster/dom-sanitizer: A simple but effective DOM/SVG/MathML Sanitizer for PHP 7.3+ · GitHub

https://github.com/rhukster/dom-sanitizer/
github_release Patch Available

1.0.16

Patch available: rhukster/dom-sanitizer 1.0.16

https://github.com/rhukster/dom-sanitizer/releases/tag/1.0.16
github_commit Patch Available

commit 139c46c3d7c9 (rhukster/dom-sanitizer)

Patch available: rhukster/dom-sanitizer 1.0.16 (contains commit 139c46c3d7c9)

https://github.com/rhukster/dom-sanitizer/commit/139c46c3d7c9bc81542b7b5a58d5cde5d0e0195a
github Patch Available🟡 PoC Available

Incomplete filtering of url() in SVG presentation attributes — CSS comments and escape sequences bypass DOMSanitizer::isExternalUrl(). · Advisory · rhukster/dom-sanitizer · GitHub

https://github.com/rhukster/dom-sanitizer/security/advisories/GHSA-cjfg-j8jp-5xvc

Vendor Advisories for CVE-2026-103687(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 01:20 UTCEG score recompute
  2. 2026-10-04 01:20 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-03 12:08 UTCGHSA enrichment
  5. 2026-10-02 22:57 UTCEG score recompute
  6. 2026-10-02 22:57 UTCGHSA enrichment
  7. 2026-10-02 09:44 UTCGHSA enrichment
  8. 2026-10-01 20:34 UTCGHSA enrichment
  9. 2026-10-01 16:26 UTCEG score recompute
  10. 2026-10-01 16:26 UTCGHSA enrichment
  11. 2026-10-01 15:22 UTCEG score recompute
  12. 2026-10-01 15:22 UTCNVD updateCVSS v4 → 5.5
  13. 2026-10-01 14:41 UTCEG score recompute
  14. 2026-10-01 14:40 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-103687?
CVE-2026-103687 is a high vulnerability published on October 1, 2026. 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…
When was CVE-2026-103687 disclosed?
CVE-2026-103687 was first published on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103687 actively exploited?
CVE-2026-103687 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103687?
CVE-2026-103687 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103687?
A fix for CVE-2026-103687 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-103687 are linked in the Vendor Advisories panel on this page.

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