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CVE-2026-121451AB Download Manager before 1.11.2 Arbitrary File Write via /start-headless-download CSRF
AB Download Manager before 1.11.2 contains a cross-site request forgery vulnerability in its unauthenticated browser-integration API that allows remote attackers to write attacker-chosen files to arbitrary paths. A malicious web page can send a text/plain request to /start-headless-download with crafted folder and name values, placing payloads in startup folders for code execution on next login.
8.7 HIGHEPSS 0.28%Not in KEVNVD: Deferred
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.7 | HIGH | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 8.8 | HIGH | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-121451
- Status
- Deferred
- Assigner (CNA)
- VulnCheck
- Published
- Nov 3, 2026
- Last modified
- 2026-11-03 16:30 UTC
- Weaknesses
- CWE-352 · Cross-Site Request Forgery (CSRF)
Affected Products
As published by the CNA in the CVE record.
amir1376ab-download-manager1 version range
- before 1.11.2
References
- github.com https://github.com/amir1376/ab-download-manager
- github.com https://github.com/amir1376/ab-download-manager/blob/v1.11.1/desktop/app/src/main/kotlin/com/abdownloadmanager/desktop/integration/IntegrationHandlerImp.kt#L55-L88
- github.com https://github.com/amir1376/ab-download-manager/blob/v1.11.1/integration/server/src/main/kotlin/com/abdownloadmanager/integration/Endpoints.kt#L27-L75
- github.com https://github.com/amir1376/ab-download-manager/commit/34cd27af6a9a6c2046af112bc9bd34828fec0bbc
- github.com https://github.com/amir1376/ab-download-manager/issues/1489
- vulncheck.com https://www.vulncheck.com/advisories/ab-download-manager-before-1.11.2-arbitrary-file-write-via-start-headless-download-csrf