CVE•Published 2026-08-28•Modified 2026-09-08•1 article on news•5 live references•NVD data
CVE-2026-37236
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
37
Exploit Prediction Scoring System · top 63% of all CVEs
Weaknesses (CWE)
Description
grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is rewritten to an arbitrary attacker-supplied value before routing. This allows bypassing method-based access controls enforced by upstream proxies or WAFs.
Timeline
Published 2026-08-28
Modified 2026-09-08
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-2026-37236Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-37236Censys host search filtered to this CVE id.
grep.app
CVE-2026-37236Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-37236GitHub code search for direct mentions.
Google dork
"CVE-2026-37236" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-37236 on GitHub.