CVE-2026-42601: ArchiveBox is an open source self-hosted web archiving system

Q: How do I fix CVE-2026-42601?

archivebox: upgrade to 0.8.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-42601 being exploited?

CVE-2026-42601 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42601 affect?

CVE-2026-42601 affects archivebox. Severity is critical (CVSS 9.8). 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

Q: How urgent is CVE-2026-42601?

Priority 53/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-42601 is a critical-severity flaw (CVSS 9.8) affecting archivebox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-88
Published	2026-05-09
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: archivebox

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-09 20:16 UTCPublished CVE record published
2026-07-24 19:10 UTCUpdated Record last modified

archivebox archivebox UPGRADE

Affected: < 0.8.6 · 0.8.6 rc0

Fixed in: 0.8.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy archivebox || rpm -q archivebox || archivebox --version

2. UPGRADE to 0.8.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade archivebox

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade archivebox

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42601?

archivebox: upgrade to 0.8.6. Exact commands for each OS are on this page.

Is CVE-2026-42601 being exploited?

CVE-2026-42601 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42601 affect?

CVE-2026-42601 affects archivebox. Severity is critical (CVSS 9.8). 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

How urgent is CVE-2026-42601?

Priority 53/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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