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CVE-2026-42571: Privilege Escalation Attack affecting Pelican Web UI

• Severity: critical (CVSS 9.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-09 · updated 2026-07-24
• Weakness: CWE-863

Description

Pelican is a platform for creating data federations. From versions 7.21.0 to before 7.21.5, 7.22.0 to before 7.22.3, 7.23.0 to before 7.23.3, and 7.24.0 to before 7.24.2, there is a a privilege escalation vulnerability affecting Pelican's Web User Interface (WebUI). This attack allows any user authenticated to the WebUI via OAuth to gain admin privileges under certain configurations. This issue has been patched in versions 7.21.5, 7.22.3, 7.23.3, and 7.24.2.

Affected products

• PelicanPlatform pelican: from 7.21.0, < 7.21.5; from 7.22.0, < 7.22.3; from 7.23.0, < 7.23.3; from 7.24.0, < 7.24.2

References

• https://github.com/PelicanPlatform/pelican/commit/7f73b9c3e677a0ae4a0ec465c5d98bb8bd948854
• https://github.com/PelicanPlatform/pelican/security/advisories/GHSA-rpfr-x88x-xwcw

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