Apache Thrift is a widely used RPC framework; a remote heap overflow allowing RCE/DoS across many services is broadly impactful.
CVE-2026-83632
Heap-based buffer overflow in Apache Thrift (<0.25.0) enabling RCE/DoS.
Is CVE-2026-83632 being exploited?
Not confirmed. CVE-2026-83632 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 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-83632?
CVE-2026-83632 is rated Critical with a CVSS score of 9.2. 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-2026-83632?
Yes. A fix has been recorded for CVE-2026-83632. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-83632 affect?
CVE-2026-83632 affects Apache Thrift < 0.25.0, Services using Thrift RPC libraries, Products embedding Thrift clients/servers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-83632?
Upgrade to Apache Thrift 0.25.0 immediately; apply WAF/workarounds if unable to patch.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted Thrift messages can trigger integer overflow and heap buffer overflow, allowing remote code execution or service crash/DoS.
Immediate action required
- affected< 0.25.0
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.