mikefarah yq up to 4.53.3 encoder_properties.go Encode escape output

Summaryinfo

A vulnerability, which was classified as critical, has been found in mikefarah yq up to 4.53.3. This vulnerability affects the function Encode of the file pkg/yqlib/encoder_properties.go. Performing a manipulation results in escape output. This vulnerability is identified as CVE-2026-124987. The attack can be initiated remotely. Additionally, an exploit exists. The pull request to fix this issue awaits acceptance.

Detailsinfo

A vulnerability classified as critical has been found in mikefarah yq up to 4.53.3. This affects the function Encode of the file pkg/yqlib/encoder_properties.go. The manipulation with an unknown input leads to a escape output vulnerability. CWE is classifying the issue as CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-124987. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details and a exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/09/2026).

It is declared as proof-of-concept. The pull request to fix this issue awaits acceptance.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• mikefarah

Name

• yq

Version

• 4.53.0
• 4.53.1
• 4.53.2
• 4.53.3

Website

• Product: https://github.com/mikefarah/yq/

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Submitinfo

Accepted

• Submit #1040562: https://github.com/mikefarah/ yq <= 4.53.3 Improper Neutralization of Escape, Meta, or Control Sequences (by carfeii)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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