CVE-2026-42571
Privilege escalation via Pelican WebUI OAuth for authenticated users
Is CVE-2026-42571 being exploited?
Not confirmed. CVE-2026-42571 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-42571?
CVE-2026-42571 is rated Critical with a CVSS score of 9.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-42571?
Yes. A fix has been recorded for CVE-2026-42571. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42571 affect?
CVE-2026-42571 affects Pelican WebUI: versions 7.21.0–7.21.4, 7.22.0–7.22.2, 7.23.0–7.23.2, 7.24.0–7.24.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42571?
Upgrade to patched releases: 7.21.5+, 7.22.3+, 7.23.3+, 7.24.2
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
OAuth-authenticated WebUI users can escalate to admin, potentially full Pelican control.
Patch when possible
- affected>= 7.21.0 and < 7.21.5
- affected>= 7.22.0 and < 7.22.3
- affected>= 7.23.0 and < 7.23.3
- affected>= 7.24.0 and < 7.24.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.