by Kastro
Paper/Archive/CVE-2026-30863

CVE-2026-30863

parse-community parse-server — Parse Server: JWT audience validation bypass in Google, Apple, and Facebook authentication adapters

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 45.8.458 × 209.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.10 and 9.5.0-alpha.11, the Google, Apple, and Facebook authentication adapters use JWT verification to validate identity tokens. When the adapter's audience configuration option is not set (clientId for Google/Apple, appIds for Facebook), JWT verification silently skips audience claim validation. This allows an attacker to use a validly signed JWT issued for a different application to authenticate as any user on the target Parse Server. This issue has been patched in versions 8.6.10 and 9.5.0-alpha.11.

Affected

ProductAffectedFixed inSource
parse-server< 8.6.10–CNA
parse-server< 9.5.0-alpha.11–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/parse-community/parse-server/security/advisories/GHSA-x6fw-778m-wr9v