Riskcovery

CVE-2026-35464

pyLoad has an incomplete fix for CVE-2026-33509: unprotected storage_folder enables arbitrary file write to Flask session store and code execution

State
Published
Severity
7.5 High
Published
Apr 7, 2026
Updated
Apr 7, 2026
Reserved
Apr 2, 2026

Read the record on cve.org

Description

pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HGitHub_M

Weaknesses

  • CWE-502 Deserialization of Untrusted Data
  • CWE-863 Incorrect Authorization

Affected Products

ProductVersions
pyloadpyload
  • <= 0.5.0b3.dev96Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.