CVE-2026-101005
highA vulnerability was detected in October CMS up to 4.3.4.
A vulnerability was detected in October CMS up to 4.3.4. This affects the function validateExternalImageHost of the file System/Classes/ResizeImages.php of the component SSRF Protection. The manipulation results in server-side request forgery. The attack may be launched remotely. The exploit is now public and may be used. Upgrading to version 4.3.5 is able to mitigate this issue. You should upgrade the affected component.
CVSS
7.3
7.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Severity source: NVD CVSS v3.1 (cna@vuldb.com)
Timeline (UTC)
Published: 2026-09-28 07:17
Modified: 2026-09-28 15:16
NVD status: Deferred
Last synced 2 days ago
Verified against the source API 2026-10-27 06:56 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.md cna@vuldb.com
- https://github.com/octobercms/october/releases/tag/v4.3.5 cna@vuldb.com
- https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226 cna@vuldb.com
- https://vuldb.com/cve/CVE-2026-101005 cna@vuldb.com
- https://vuldb.com/submit/922294 cna@vuldb.com
- https://vuldb.com/vuln/410875 cna@vuldb.com
- https://vuldb.com/vuln/410875/cti cna@vuldb.com
- https://www.cybersecurity-help.cz/vdb/vulns/149488/ cna@vuldb.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗