Is CVE-2026-35459 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-35459 being exploited in the wild.

How severe is CVE-2026-35459?

Critical severity, with a CVSS score of 9.1, published 6 April 2026.

Which products and versions are affected?

pyLoad <= 0.5.0b3.dev96; pyload-ng (PyPI) ECOSYSTEM:introduced=0,last_affected=0.5.0b3.dev96.

Is there a fix for CVE-2026-35459?

A patch was published on 2026-04-06: Fix committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-35459 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-35459?

Check whether you run pyLoad or pyload-ng (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-35459: pyLoad SSRF via HTTP redirect bypass in BaseDownloader

Q: Which products and versions are affected?

pyLoad <= 0.5.0b3.dev96; pyload-ng (PyPI) ECOSYSTEM:introduced=0,last_affected=0.5.0b3.dev96.

Q: Is there a fix for CVE-2026-35459?

A patch was published on 2026-04-06: Fix committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-35459 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-35459?

Check whether you run pyLoad or pyload-ng (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-35459 · Severity: critical · CVSS 9.1 · Published 2026-04-06

pyLoad is an open-source download manager used to automate file downloads. A security flaw allows authenticated users to trick the software into making requests to internal network services or cloud metadata endpoints that should be private. This could lead to the exposure of sensitive internal data, such as cloud credentials or private server information, potentially compromising the entire hosting environment.

Technologies: pyLoad, pyload-ng (PyPI). Vendors: pyLoad, PyPI.

Quick answers

Is CVE-2026-35459 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-35459 being exploited in the wild.
How severe is CVE-2026-35459?: Critical severity, with a CVSS score of 9.1, published 6 April 2026.
Which products and versions are affected?: pyLoad <= 0.5.0b3.dev96; pyload-ng (PyPI) ECOSYSTEM:introduced=0,last_affected=0.5.0b3.dev96.
Is there a fix for CVE-2026-35459?: A patch was published on 2026-04-06: Fix committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-35459 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-35459?: Check whether you run pyLoad or pyload-ng (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A server-side request forgery (SSRF) vulnerability exists in pyLoad due to an incomplete fix for a previous vulnerability. While the software validates the hostname of the initial download URL in BaseDownloader.download(), the underlying pycurl library is configured to follow up to 10 HTTP redirects (FOLLOWLOCATION=1) without re-validating the redirect targets. An authenticated attacker with 'ADD' permissions can provide a URL pointing to a malicious server that issues a 302 redirect to an internal IP address (e.g., 127.0.0.1 or 169.254.169.254). This allows the attacker to bypass the SSRF filter and retrieve sensitive data from internal services or cloud metadata endpoints. The issue is addressed in version 0.5.0b3.dev97.

Affected products

pyLoad pyLoad <= 0.5.0b3.dev96
pyLoad-ng project pyload-ng < 0.5.0b3.dev97

Identifiers

CVE-2026-35459
GHSA-7gvf-3w72-p2pg
PYSEC-2026-495

Timeline

2026-04-02: advisory: GitHub Security Advisory published
2026-04-06: disclosed: CVE published to NVD
2026-04-06: patched: Fix committed to repository

References

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