What is CVE-2026-63508?

CVE-2026-63508 is a critical-severity vulnerability in Microsoft Planetary Computer Pro (Geocatalog), classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-08-07.

How severe is CVE-2026-63508?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Auth bypass in Microsoft Planetary Computer Pro (Geocatalog)

CVE-2026-63508

Missing authentication for critical function in Microsoft Planetary Computer Pro allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: Broken Authentication

Published 2026-08-07 · last modified 2026-10-24.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.6th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63508 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-63508?: CVE-2026-63508 is a critical-severity vulnerability in Microsoft Planetary Computer Pro (Geocatalog), classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-08-07.
How severe is CVE-2026-63508?: Critical severity. CVSS v3 base score is 10.0 out of 10.