CVE-2026-103687
CVE-2026-103687 is a high-severity vulnerability with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-183.
Key facts
- Severity: High (CVSS 3.x base score 7.3)
- CVSS v2: 7.5
- CVSS v4: 5.5
- EPSS exploit prediction: 1% (44th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-183
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-103687?
- 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.
- How severe is CVE-2026-103687?
- CVE-2026-103687 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2026-103687 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-103687?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2026-103687 published?
- CVE-2026-103687 was published on 2026-10-01.
References
- https://github.com/rhukster/dom-sanitizer/
- https://github.com/rhukster/dom-sanitizer/commit/139c46c3d7c9bc81542b7b5a58d5cde5d0e0195a
- https://github.com/rhukster/dom-sanitizer/releases/tag/1.0.16
- https://github.com/rhukster/dom-sanitizer/security/advisories/GHSA-cjfg-j8jp-5xvc
- https://vuldb.com/cve/CVE-2026-103687
- https://vuldb.com/submit/958345
- https://vuldb.com/vuln/412551
- https://vuldb.com/vuln/412551/cti
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