6.5
MEDIUM CVSS 2.0
CVE-2026-3958
Woahai321 ListSync JSON api_server.py requests.post server-side request forgery
Description

A vulnerability has been found in Woahai321 ListSync up to 0.6.6. This issue affects the function requests.post of the file list-sync-main/api_server.py of the component JSON Handler. The manipulation leads to server-side request forgery. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

INFO

Published Date :

March 11, 2026, 10:16 p.m.

Last Modified :

March 11, 2026, 10:16 p.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2026-3958 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
CVSS 4.0 MEDIUM [email protected]
Solution
Update the application to patch the server-side request forgery vulnerability.
  • Update Woahai321 ListSync to a version later than 0.6.6.
  • Review and sanitize all user-supplied input for list-sync-main/api_server.py.
  • Implement strict allow-lists for network requests.
  • Consider disabling the affected API endpoint if not critical.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-3958.

URL Resource
https://github.com/Woahai321/list-sync/issues/79
https://github.com/Woahai321/list-sync/issues/79#issue-3993946476
https://vuldb.com/?ctiid.350388
https://vuldb.com/?id.350388
https://vuldb.com/?submit.768070
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-3958 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-3958 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-3958 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-3958 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Mar. 11, 2026

    Action Type Old Value New Value
    Added Description A vulnerability has been found in Woahai321 ListSync up to 0.6.6. This issue affects the function requests.post of the file list-sync-main/api_server.py of the component JSON Handler. The manipulation leads to server-side request forgery. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
    Added CVSS V2 (AV:N/AC:L/Au:S/C:P/I:P/A:P)
    Added CWE CWE-918
    Added Reference https://github.com/Woahai321/list-sync/issues/79
    Added Reference https://github.com/Woahai321/list-sync/issues/79#issue-3993946476
    Added Reference https://vuldb.com/?ctiid.350388
    Added Reference https://vuldb.com/?id.350388
    Added Reference https://vuldb.com/?submit.768070
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.3
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 6.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 6.5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact