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Advisory details: pypa / pyload-ng/PYSEC-2026-1817
Advisory ID pypa/pyload-ng/PYSEC-2026-1817
Aliases CVE-2024-24808
GHSA-g3cm-qg2v-2hj5
PYSEC-2026-1817
Summary pyLoad open redirect vulnerability due to improper validation of the is_safe_url function ### Summary Open redirect vulnerability due to incorrect validation of input values when redirecting users after login. ### Details pyload is validating URLs via the `get_redirect_url` function when redirecting users at login. ![301715649-f533db41-d0bd-44f7-8735-be1887fbd06c](https://github.com/pyload/pyload/assets/114328108/7fbec2ed-05ed-46e6-847f-05132cf3f136) The URL entered in the `next` variable goes through the `is_safe_url` function, where a lack of validation can redirect the user to an arbitrary domain. ![301715667-2819b1d3-8a14-42f4-89c8-3d2fa84fc309](https://github.com/pyload/pyload/assets/114328108/613484f3-8097-4871-887d-8fa5eec817cc) The documentation in the urllib library shows that improper URLs are recognized as relative paths when using the `urlparse` function. (https://docs.python.org/3/library/urllib.parse.html#urllib.parse.urlparse) For example, When an unusual URL like `https:///example.com` is entered, `urlparse` interprets it as a relative path, but in the actual request it is converted to `https://example.com` due to url normalization. ### PoC 1. In the next variable, insert the URL to which you want to redirect the user. ![301715949-bb1451eb-5e84-451d-83b4-5c3e204d1df7](https://github.com/pyload/pyload/assets/114328108/6fe639ea-1f85-4715-bf6c-c9c8c4ee9c94) 2. Check that it is possible to bypass url validation and redirect users to an arbitrary url. ![301715824-3de6584a-878d-4ec4-a3d5-a34d11c6c0ac](https://github.com/pyload/pyload/assets/114328108/902b3244-a4ef-4f8e-8319-c4b92764f15f) ![301716107-ba5ab7b9-7aa8-4b7a-8924-eba82442b4c3](https://github.com/pyload/pyload/assets/114328108/35191d7b-50b9-4a46-8319-ebdebec20b41) ### Impact An attacker can use this vulnerability to redirect users to malicious websites, which can be used for phishing and similar attacks.
Status Published
Exploitability 0.5
Weighted Severity 5.5
Risk 2.8
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/pypa/advisory-database/blob/main/vulns/pyload-ng/PYSEC-2026-1817.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2024-02-06T16:57:09Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2024/24xxx/CVE-2024-24808.json

Source Advisory: vulnrichment/CVE-2024-24808

View SSVC decision tree
[{'Exploitation': 'poc'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]