CVE-2026-35187

Name: CVE-2026-35187
Creator: NVD / NIST
Published: 2026-04-06T20:16:27.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2026-35187 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. 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. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

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).

Metrics

CVSS 3.1

7.7/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS Probability

0.27%

18.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions
Pyload-Ng Project	Pyload-Ng	< 0.5.0b3.dev97

References

https://github.com/pyload/pyload/commit/4032e57d61d8f864e39f4dcfdb567527a50a9e1fPatch
https://github.com/pyload/pyload/security/advisories/GHSA-2wvg-62qm-gj33Exploit, Mitigation, Vendor Advisory
https://github.com/pyload/pyload/security/advisories/GHSA-2wvg-62qm-gj33Exploit, Mitigation, Vendor Advisory

Timeline

Published: Apr 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-35187?

How severe is CVE-2026-35187?

CVE-2026-35187 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-35187?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-35187?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST