CVE-2026-42312 pyload-ng: non-admin SETTINGS users can disable outbound TLS peer verification
Authenticated non-admin users can disable TLS verification, allowing on-path attackers to intercept traffic via forged certificates.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-42312?
CVE-2026-42312 is a medium-severity vulnerability in pyload, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the set_config_value() API method (@permission(Perms.SETTINGS)) in src/pyload/core/api/__init__.py gates security-sensitive options behind a hand-maintained allowlist ADMIN_ONLY_CORE_OPTIONS. The option ("general", "ssl_verify") is not on that allowlist. Any authenticated user with the non-admin SETTINGS permission can set general.ssl_verify = off, and every subsequent outbound pycurl request is made with SSL_VERIFYPEER=0 and SSL_VERIFYHOST=0 — TLS peer and hostname verification are fully disabled. An on-path attacker can then present forged certificates for any hostname pyload fetches. This is a direct continuation of the fix family CVE-2026-33509 / CVE-2026-35463 / CVE-2026-35464 / CVE-2026-35586, each of which patched a different missed option in the same allowlist. This vulnerability is fixed in 0.5.0b3.dev100.
Which versions are affected by CVE-2026-42312?
3 open source packages ship an affected version, including pyload-ng. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pyload-ng PyPI | All versions | 0.5.0b3.dev100 |
pyload-ng PyPI | All versions | 0.5.0b3.dev100 |
pyload-ng PyPI | All versions | 0.5.0b3.dev100 |
Products include Pyload-Ng Project Pyload-Ng.
How do I fix CVE-2026-42312?
Upgrade pyload-ng to 0.5.0b3.dev100 or later.
Is CVE-2026-42312 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42312 exists.
Other vulnerabilities in pyload
- CVE-2025-54802 pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE)
- CVE-2024-22416 Cross-Site Request Forgery on any API call in pyLoad may lead to admin privilege escalation
- CVE-2023-0488 Cross-site Scripting (XSS) - Stored in pyload/pyload
- CVE-2026-35459 pyLoad has SSRF fix bypass via HTTP redirect
- CVE-2026-35463 pyLoad has Improper Neutralization of Special Elements used in an OS Command
Sources
Also known as GHSA-ccxc-x975-4hh9, PYSEC-2026-126.