CVE-2026-42601: ArchiveBox Vulnerable to RCE via unvalidated per-crawl config overrides in AddView

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-09 · updated 2026-07-24
Weakness: CWE-88

Description

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.

Affected products

ArchiveBox: before 0.8.6; 0.8.6-rc0 — fixed in 0.8.6

How to fix

Upgrade to a fixed version: ArchiveBox 0.8.6. Check the vendor advisory for mitigations.

References

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