CVE-2026-121451

HIGH 8.8

AB Download Manager before 1.11.2 Arbitrary File Write via /start-headless-download CSRF

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-352
Vendor	amir1376
Product	ab-download-manager
Published	Nov 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

amir1376 / ab-download-manager

0 < 1.11.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/amir1376/ab-download-manager/issues/1489 github.com: https://github.com/amir1376/ab-download-manager github.com: https://github.com/amir1376/ab-download-manager/commit/34cd27af6a9a6c2046af112bc9bd34828fec0bbc 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/blob/v1.11.1/desktop/app/src/main/kotlin/com/abdownloadmanager/desktop/integration/IntegrationHandlerImp.kt#L55-L88 vulncheck.com: https://www.vulncheck.com/advisories/ab-download-manager-before-1.11.2-arbitrary-file-write-via-start-headless-download-csrf

Credits

George Chen