CVE•Published 2026-09-15•Modified 2026-10-08•0 articles on news•4 live references•NVD data
CVE-2026-91991
Vulnerability data via NVD (ingested)
CVSS v3.1
5.4
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
EPSS percentile
15
Exploit Prediction Scoring System · top 85% of all CVEs
Weaknesses (CWE)
Description
Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to set_cookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or SameSite to bypass validation and modify cookie security attributes.
Timeline
Published 2026-09-15
Modified 2026-10-08
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-2026-91991Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-91991Censys host search filtered to this CVE id.
grep.app
CVE-2026-91991Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-91991GitHub code search for direct mentions.
Google dork
"CVE-2026-91991" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-91991 on GitHub.
We haven't classified any articles referencing CVE-2026-91991 yet. The external references above still apply.