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Low

pyLoad's Session Not Invalidated After Permission Changes

  • Disclosed: 14.04.2026
  • Updated: 11.10.2026 12:19

Summary

The pyload application does not properly invalidate or modify sessions upon changes made to a user's permissions.

Details

Whenever an administrator changes the permissions a specific account has, they do not expect that account still being able to access data that their new permissions do not allow. This is not the case for the pyload application, as a user with a valid session can still perform the actions.

PoC

Take a user with all the permissions, as shown below. image

We now log in as this user. image

Let us now take away all the permissions. image

The logged in session can still be used to access everything in the application. image

Impact

Should permissions be taken away, then the user is expected not to be able to execute the actions belonging to those actions anymore.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) pyload-ng <= 0.5.0b3.dev97 no fix

References

CVSS score -
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Weakness (CWE)
CWE-613
Platform
Python (PyPI)
Package
pyload-ng
Disclosed
14.04.2026
Updated
11.10.2026 12:19

Sources and licenses

OSV / GitHub Advisory Database - GHSA-fj52-5g4h-gmq8 - CC BY 4.0

Vulnerability history: pyload-ng

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (58) in the archive
Total entries
58
First → latest
01.2023 10.2026
Without a fix
24
Exploited in attacks
0

Severity breakdown

  • Critical 9
  • High 23
  • Medium 25
  • Low 1

Disclosures per year

Severity:
  1. pyload-ng: getUserData/get_userdata exposed at Perms.ANY allow any authenticated account to brute-force the administrator password
    High · 8.1 ghsa-68w4-83fh-f2w8 >= 0.5.0b3.dev1, <= 0.5.0b3.dev101 no fix
  2. pyLoad: Privilege revocation and password change through the REST API do not invalidate the user's session
    High · 7.5 ghsa-jq7h-wrvp-3rgx <= 0.5.0b3.dev101 no fix
  3. pyLoad: Api.set_user_permission never invalidates the target's session
    High · 7.5 ghsa-889w-m37p-88m5 >= 0.5.0b3.dev98, <= 0.5.0b3.dev101 no fix
  4. pyLoad: Tar extraction creates device nodes and FIFOs (member types not filtered; tarfile extractall without filter=)
    High ghsa-fr26-jjhm-638c <= 0.5.0b3.dev101 no fix
  5. pyLoad has an authentication bypass in API key validation (check_apikey cache)
    High · 8.1 ghsa-r44w-v6gf-x3p6 < 0.5.0b3.dev101 0.5.0b3.dev101
  6. pyLoad is vulnerable to stored XSS in Downloads view via unsanitized link URL in packages.js template literal
    High · 8.7 CVE-2026-45348 <= 0.5.0b3.dev99 no fix
  7. PyLoad vulnerable to Path Traversal via Package Folder Name in set_package_data
    High · 8.1 CVE-2026-42315 < 0.5.0b3.dev100 0.5.0b3.dev100
  8. pyload-ng: non-admin SETTINGS users can redirect all outbound traffic through an attacker-controlled proxy via unrestricted `proxy.*` config (incomplete fix for CVE-2026-33509 / -35463 / -35464 / -35586)
    High · 8.3 CVE-2026-42313 < 0.5.0b3.dev100 0.5.0b3.dev100
  9. pyLoad's Session Not Invalidated After Permission Changes this entry
    Low ghsa-fj52-5g4h-gmq8 <= 0.5.0b3.dev97 no fix
  10. pyLoad has Stale Session Privilege After Role/Permission Change (Privilege Revocation Bypass)
    High · 8.8 CVE-2026-41133 <= 0.5.0b3.dev97 no fix
  11. pyLoad: Unprotected storage_folder enables arbitrary file write to Flask session store and code execution (Incomplete fix for CVE-2026-33509)
    High · 7.5 CVE-2026-35464 <= 0.5.0b3 no fix
  12. pyLoad: Improper Neutralization of Special Elements used in an OS Command
    High · 8.8 CVE-2026-35463 <= 0.5.0b3.dev96 no fix
  13. pyLoad: SSRF filter bypass via HTTP redirect in BaseDownloader (Incomplete fix for CVE-2026-33992)
    Critical CVE-2026-35459 <= 0.5.0b3.dev96 no fix
  14. pyLoad: SSRF in parse_urls API endpoint via unvalidated URL parameter
    High · 7.7 CVE-2026-35187 <= 0.5.0b3.dev96 no fix
  15. pyLoad: Server-Side Request Forgery via Download Link Submission Enables Cloud Metadata Exfiltration
    Critical CVE-2026-33992 <= 0.5.0b3.dev96 no fix
  16. pyLoad SETTINGS Permission Users Can Achieve Remote Code Execution via Unrestricted Reconnect Script Configuration
    High · 7.5 CVE-2026-33509 >= 0.4.0, <= 0.5.0b3.dev96 no fix
  17. pyLoad has an Arbitrary File Write via Path Traversal in edit_package()
    High · 7.1 CVE-2026-29778 >= 0.5.0b3.dev13, < 0.5.0b3.dev97 0.5.0b3.dev97
  18. pyLoad CNL and captcha handlers allow Code Injection via unsanitized parameters
    High · 8.1 CVE-2025-61773 < 0.5.0b3.dev91 0.5.0b3.dev91
  19. Denial-of-Service attack in pyLoad CNL Blueprint using dukpy.evaljs
    High CVE-2025-57751 < 0.5.0b3.dev92 0.5.0b3.dev92
  20. PyLoad vulnerable to SQL Injection via API /json/add_package in add_links parameter
    High CVE-2025-55156 < 0.5.0b3.dev91 0.5.0b3.dev91
Show more (13) Showing 20 of 33

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