CVE•Published 2026-07-30•Modified 2026-07-31•1 article on news•6 live references•NVD data
CVE-2026-52539
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
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Weaknesses (CWE)
Description
Outstatic CMS <= 2.1.9 contains a hardcoded JWT signing secret. When the OST_TOKEN_SECRET environment variable is not set, the application falls back to the default value which is publicly visible in the source code repository. An unauthenticated remote attacker can exploit this by forging JWT session tokens with arbitrary user data and full administrative permissions.
Timeline
Published 2026-07-30
Modified 2026-07-31
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-52539Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-52539Censys host search filtered to this CVE id.
grep.app
CVE-2026-52539Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-52539GitHub code search for direct mentions.
Google dork
"CVE-2026-52539" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.