CVE-2026-46561 pyLoad: SSRF via HTTP Redirect Bypass in parse_urls API
An authenticated attacker can bypass private IP checks via HTTP redirects in the parse_urls API, enabling Server-Side Request Forgery against internal networks.
- 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-2026-46561?
CVE-2026-46561 is a medium-severity server-side request forgery vulnerability in pyload, published on 28 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 PREREQFUNCTION-based private IP check was not applied to HTTPRequest (used by the parse_urls API). An authenticated attacker can supply a URL pointing to an attacker-controlled server that responds with a 302 redirect to an internal/private IP address, bypassing the is_global_host() check on the initial URL. This vulnerability is fixed in 0.5.0b3.dev100.
Weakness: CWE-918
Which versions are affected by CVE-2026-46561?
3 open source packages ship an affected version, including pyload-ng.
| 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 |
How do I fix CVE-2026-46561?
Upgrade pyload-ng to 0.5.0b3.dev100 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-46561 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46561 exists.
Sources
Also known as GHSA-8rp3-xc6w-5qp5, PYSEC-2026-2991.