How severe is CVE-2026-35459?

CVE-2026-35459 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-35459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35459?

CVE-2026-35459 affects Pyload-ng Project Pyload-ng. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35459?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-35459 have an EU (EUVD) identifier?

Yes. CVE-2026-35459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19481.

When was CVE-2026-35459 published?

CVE-2026-35459 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-35459

CVE-2026-35459 is a critical-severity vulnerability in Pyload-ng Project Pyload-ng with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 9.3
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19481
Weakness: CWE-918
Affected product: Pyload-ng Project Pyload-ng
Published: 2026-04-06
Last modified: 2026-06-17

Description

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 against the SSRF filter. An authenticated user with ADD permission can bypass the SSRF fix by submitting a URL that redirects to an internal address.

Frequently asked questions

What is CVE-2026-35459?: 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 against the SSRF filter. An authenticated user with ADD permission can bypass the SSRF fix by submitting a URL that redirects to an internal address.
How severe is CVE-2026-35459?: CVE-2026-35459 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-35459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35459?: CVE-2026-35459 affects Pyload-ng Project Pyload-ng. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-35459 have an EU (EUVD) identifier?: Yes. CVE-2026-35459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19481.
When was CVE-2026-35459 published?: CVE-2026-35459 was published on 2026-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:*

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