CVE-2026-61486
Stack-based buffer overflow in retired Apache Lucy may enable RCE.
Is CVE-2026-61486 being exploited?
Not confirmed. CVE-2026-61486 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 0.63% probability of exploitation in the next 30 days.
How severe is CVE-2026-61486?
CVE-2026-61486 is rated Critical with a CVSS score of 9.8. 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-2026-61486?
Yes. A fix has been recorded for CVE-2026-61486. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-61486 affect?
CVE-2026-61486 affects Apache Lucy (all versions), Applications embedding Apache Lucy, Legacy search systems using Lucy. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-61486?
Isolate/disable Lucy, restrict access, and migrate to a supported search library.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Stack-based buffer overflow when processing input may allow remote code execution or crash (RCE/DoS) in apps embedding Lucy.
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.