Tactical RMM 0.17.0 through 1.6.1 Arbitrary File Read via Report Preview

Advisories

Tactical RMM 0.17.0 through 1.6.1 Arbitrary File Read via Report Preview

Severity: critical
Date: 11/13/2026
Affecting: Tactical RMM >= 0.17.0, <= 1.6.1
CVE: CVE-2026-129165
CWE: CWE-73 External Control of File Name or Path
CVSS: 9.4
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
References: https://vul.yulun.ac.cn/20261028/tacticalrmm/
https://github.com/amidaware/tacticalrmm/blob/086e2d9714b1716796722c7e0c19a1ebe08a39f2/api/tacticalrmm/ee/reporting/utils.py#L110-L117
https://github.com/amidaware/tacticalrmm/blob/086e2d9714b1716796722c7e0c19a1ebe08a39f2/api/tacticalrmm/ee/reporting/views.py#L202-L245
https://github.com/amidaware/tacticalrmm/blob/086e2d9714b1716796722c7e0c19a1ebe08a39f2/api/tacticalrmm/tacticalrmm/utils.py#L227-L236
Credit: Wu Yulun
Description: Tactical RMM 0.17.0 through 1.6.1 contains an arbitrary file read in the /reporting/templates/preview/ endpoint because WeasyPrint resolves file:// links in user-supplied template_md and embeds the files in the returned PDF. Users with report management permission can read the Django SECRET_KEY, reused as the NATS password, and publish runscript commands to every managed agent.

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