SSRF in Pyload
CVE-2026-35459
pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, pyLoad has a server-side request forgery (SSRF) vulnerability. The fix for CVE-2026-33992 added IP validation to BaseDownloader.download() that checks the hostname of the initial download URL. However, pycurl is configured with FOLLOWLOCATION=1 and MAXREDIRS=10, causing it to automatically follow HTTP redirects. Redirect targets are never validated against the SSRF filter. An authenticated user with ADD permission can bypass the SSRF fix by submitting a URL that redirects to an internal address.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Pyload — versions <= 0.5.0b3.dev96
- Pyload-Ng Project
Weakness classification (CWE)
References
- github.com/pyload/pyload/security/advisories/GHSA-7gvf-3w72-p2pg (Exploit, Mitigation, Vendor Advisory)
- github.com/pyload/pyload/commit/33c55da084320430edfd941b60e3da0eb1be9443 (Patch)
Frequently asked questions
- What is CVE-2026-35459?
- CVE-2026-35459 is a critical-severity vulnerability in Pyload, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-04-06.
- How severe is CVE-2026-35459?
- Critical severity. CVSS v3 base score is 9.1 out of 10.