ArchiveBox up to 0.8.6rc0 Environment Variable /add/ argument injection

Summaryinfo

A vulnerability identified as critical has been detected in ArchiveBox up to 0.8.6rc0. This affects an unknown function of the file /add/ of the component Environment Variable Handler. Performing a manipulation results in argument injection. This vulnerability is cataloged as CVE-2026-42601. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in ArchiveBox up to 0.8.6rc0. This affects some unknown functionality of the file /add/ of the component Environment Variable Handler. The manipulation with an unknown input leads to a argument injection vulnerability. CWE is classifying the issue as CWE-88. The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

ArchiveBox is an open source self-hosted web archiving system. In versions 0.8.6rc0 and prior, the /add/ endpoint (AddView in core/views.py) accepts a config JSON field that gets merged into the crawl config without validation. This config is exported as environment variables when archive plugins run, allowing injection of arbitrary tool arguments to achieve RCE. At time of publication, there are no publicly available patches.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-42601 since 04/29/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/18/2026). MITRE ATT&CK project uses the attack technique T1059 for this issue.

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

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• ArchiveBox

Version

• 0.8.6rc0

Website

• Product: https://github.com/ArchiveBox/ArchiveBox/

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