CVE-2026-2836
Default Pingora CacheKey causes cache poisoning and cross-tenant leakage.
Is CVE-2026-2836 being exploited?
Not confirmed. CVE-2026-2836 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 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-2836?
CVE-2026-2836 is rated High with a CVSS score of 8.4. 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-2026-2836?
Yes. A fix has been recorded for CVE-2026-2836. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-2836 affect?
CVE-2026-2836 affects Pingora HTTP proxy framework (alpha caching). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-2836?
Upgrade to v0.8.0+; implement custom CacheKey including Host header and scheme
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Cross-tenant data leakage and cache poisoning via insecure default CacheKey; attacker may serve poisoned responses.
Immediate action required
- affected< 0.8.0
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.