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CVE-2026-42313

Pyload-ng server-side request forgery (SSRF)

8.3 HIGHPublic exploitEPSS 0.39%
  1. Published11 May 2026

Description

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the set_config_value() API method (@permission(Perms.SETTINGS)) in src/pyload/core/api/__init__.py gates security-sensitive options behind a hand-maintained allowlist ADMIN_ONLY_CORE_OPTIONS. The allowlist contains ("proxy", "username") and ("proxy", "password") — which protect the proxy credentials — but it does not include ("proxy", "enabled"), ("proxy", "host"), ("proxy", "port"), or ("proxy", "type"). Any authenticated user with the non-admin SETTINGS permission can enable proxying and point pyload at any host they control. From that point, every outbound download, captcha fetch, update check, and plugin HTTP call is transparently routed through the attacker. This is a direct continuation of the fix family CVE-2026-33509 / CVE-2026-35463 / CVE-2026-35464 / CVE-2026-35586, each of which patched a different missed option in the same allowlist. This vulnerability is fixed in 0.5.0b3.dev100.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected products

Pyload-ng< 0.5.0b3.dev100

Remediation

Fixed in
Pyload-ng≥ 0.5.0b3.dev100

References

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Frequently asked

Is CVE-2026-42313 being actively exploited?

CVE-2026-42313 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.39%.

How severe is CVE-2026-42313?

CVE-2026-42313 has a CVSS 3.1 base score of 8.3, rated high. EPSS estimates a 0.39% probability of exploitation.

Which products are affected by CVE-2026-42313?

Affected products include Pyload-ng.

How do I fix CVE-2026-42313?

Upgrade affected software to a fixed version, for example Pyload-ng 0.5.0b3.dev100 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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