CVE-2026-42601
CVE-2026-42601 is a critical-severity vulnerability in Archivebox with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-88.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 9.3
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-28935
- Weakness: CWE-88
- Affected product: Archivebox
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-42601?
- 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.
- How severe is CVE-2026-42601?
- CVE-2026-42601 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-42601 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-42601?
- CVE-2026-42601 primarily affects Archivebox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-42601?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-42601 have an EU (EUVD) identifier?
- Yes. CVE-2026-42601 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28935.
- When was CVE-2026-42601 published?
- CVE-2026-42601 was published on 2026-05-09 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:archivebox:archivebox:*:*:*:*:*:*:*:*
- cpe:2.3:a:archivebox:archivebox:0.8.6:rc0:*:*:*:*:*:*
More vulnerabilities in Archivebox
- CVE-2023-45815 — Medium (CVSS 6.4): ArchiveBox is an open source self-hosted web archiving system. Any users who are using the `wget` extractor and view…
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