CVE-2026-35459: pyLoad is a free and open-source download manager written in Python

This week

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-35459 is a critical-severity flaw (CVSS 9.1) affecting pyload-ng. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-04-06
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: pyload-ng project

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-06 20:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

pyload-ng project pyload-ng UPGRADE

Affected: < 0.5.0b3.dev97

Fixed in: 0.5.0b3.dev97

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show pyload-ng

2. UPGRADE to 0.5.0b3.dev97

pip install --upgrade "pyload-ng>=0.5.0b3.dev97"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-35459?

pyload-ng: upgrade to 0.5.0b3.dev97. Exact commands for each OS are on this page.

Is CVE-2026-35459 being exploited?

CVE-2026-35459 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-35459 affect?

CVE-2026-35459 affects pyload-ng. Severity is critical (CVSS 9.1). 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() th

How urgent is CVE-2026-35459?

Priority 47/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2026-35187 HIGH 7.7 UPGRADE pyLoad is a free and open-source download manager written in Python
CVE-2026-42315 HIGH 8.1 UPGRADE pyLoad is a free and open-source download manager written in Python
CVE-2026-42314 MEDIUM 6.5 UPGRADE pyLoad is a free and open-source download manager written in Python
CVE-2026-42313 HIGH 8.3 UPGRADE pyLoad is a free and open-source download manager written in Python
CVE-2026-42312 MEDIUM 6.8 UPGRADE pyLoad is a free and open-source download manager written in Python

References

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