CVE•Published 2026-09-09•Modified 2026-09-10•0 articles on news•5 live references•NVD data
CVE-2026-87853
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
A flaw was found in SSSD's IdP authentication provider. The eval_access_token_buf() function compares the OIDC subject identifier using strncmp() with the authenticated user's identifier length, performing a prefix comparison instead of an exact match. An attacker whose IdP identifier is a strict prefix of a target user's identifier can authenticate as the target user.
Timeline
Published 2026-09-09
Modified 2026-09-10
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-2026-87853Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-87853Censys host search filtered to this CVE id.
grep.app
CVE-2026-87853Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-87853GitHub code search for direct mentions.
Google dork
"CVE-2026-87853" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-87853 on GitHub.
We haven't classified any articles referencing CVE-2026-87853 yet. The external references above still apply.