CVE-2026-17552
SSRF in Plack::App::Prerender allows proxying to arbitrary hosts
Is CVE-2026-17552 being exploited?
Not confirmed. CVE-2026-17552 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-17552?
CVE-2026-17552 is rated Critical with a CVSS score of 9.1. 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-2026-17552?
Yes. A fix has been recorded for CVE-2026-17552. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-17552 affect?
CVE-2026-17552 affects Plack::App::Prerender < 0.3.0, Perl web applications using Plack::App::Prerender. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-17552?
Upgrade to Plack::App::Prerender 0.3.0 or validate/normalize REQUEST_URI
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Server-Side Request Forgery: attacker can force server to fetch internal/restricted hosts and return content, enabling data exposure and internal pivoting.
Immediate action required
- affected< 0.3.0
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.