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GHSA-3rxj-6cgf-8cfw

HighCVSS 7.5 / 10
Published Jan 21, 2026·Last modified Feb 3, 2026
Affected Components(0)

No affected components available

Description

Improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution.

The vulnerability can be exploited via overriding constant value and error deserialization, which allows indirect access to unsafe JS evaluation. This requires at least the ability to perform 4 separate requests on the same function and partial knowledge of how the serialized data is used during later runtime processing.

This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario.

No known workarounds or mitigations are known, so please upgrade to the patched version.

Risk Scores
Base Score
7.5

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
6.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.52%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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