CVE-2026-27613
Unauthenticated CGI param bypass enables RCE or source disclosure.
Is CVE-2026-27613 being exploited?
Not confirmed. CVE-2026-27613 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.75% probability of exploitation in the next 30 days.
How severe is CVE-2026-27613?
CVE-2026-27613 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-27613?
Yes. A fix has been recorded for CVE-2026-27613. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27613 affect?
CVE-2026-27613 affects TinyWeb web server (Delphi Win32) < 2.01. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27613?
Upgrade to 2.01; enable STRICT_CGI_PARAMS; block dangerous query params via WAF.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE or source disclosure via unsafe CGI param handling; attacker can execute code or read server scripts, depending on the CGI used.
Immediate action required
- affected< 2.01
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.