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CVE-2026-35187

Pyload-ng server-side request forgery (SSRF)

7.7 HIGHPublic exploitEPSS 0.36%
  1. Published6 Apr 2026

Description

pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, the parse_urls API function in src/pyload/core/api/__init__.py fetches arbitrary URLs server-side via get_url(url) (pycurl) without any URL validation, protocol restriction, or IP blacklist. An authenticated user with ADD permission can make HTTP/HTTPS requests to internal network resources and cloud metadata endpoints, read local files via file:// protocol (pycurl reads the file server-side), interact with internal services via gopher:// and dict:// protocols, and enumerate file existence via error-based oracle (error 37 vs empty response).

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Affected products

Pyload-ng< 0.5.0b3.dev97

Remediation

Fixed in
Pyload-ng≥ 0.5.0b3.dev97

References

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Frequently asked

Is CVE-2026-35187 being actively exploited?

CVE-2026-35187 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.36%.

How severe is CVE-2026-35187?

CVE-2026-35187 has a CVSS 3.1 base score of 7.7, rated high. EPSS estimates a 0.36% probability of exploitation.

Which products are affected by CVE-2026-35187?

Affected products include Pyload-ng.

How do I fix CVE-2026-35187?

Upgrade affected software to a fixed version, for example Pyload-ng 0.5.0b3.dev97 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-35187 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.