CVE-2026-82458: 
InfluxDB vulnerability analysis and mitigation

CVE-2026-82458 is a denial-of-service vulnerability in Apache Thrift affecting multiple language bindings — Go, netstd, OCaml, Erlang, JavaME, Rust, C++, Java, Kotlin, and D — caused by memory allocation with excessive size values and allocation of resources without limits or throttling. All versions of Apache Thrift before 0.25.0 are affected. The vulnerability was published on October 2, 2026, and carries a CVSS v4.0 base score of 8.7 (High) (Github Advisory, Red Hat).

The root cause is classified under CWE-770 (Allocation of Resources Without Limits or Throttling) and CWE-789 (Memory Allocation with Excessive Size Value). When Apache Thrift processes untrusted serialized messages, it allocates memory based on attacker-controlled size fields without enforcing upper bounds or throttling, enabling an unauthenticated remote attacker to trigger unbounded memory consumption. No authentication or user interaction is required, and attack complexity is low, making the vulnerability trivially automatable over the network (Github Advisory, Red Hat Bugzilla).

Successful exploitation causes the targeted Thrift service to exhaust available system memory and crash, resulting in a complete loss of availability for the affected service. The impact is limited to availability — there is no confidentiality or integrity impact, and no lateral movement or data exfiltration risk has been identified. Any service using a vulnerable Apache Thrift language binding (before 0.25.0) that accepts network connections from untrusted clients is at risk (Github Advisory, Red Hat).

No public proof-of-concept exploit code has been published, and there is no evidence of active in-the-wild exploitation at this time (Red Hat). The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS score is approximately 0.43%, indicating a low near-term exploitation probability. However, the attack is automatable and requires no privileges or user interaction, which lowers the barrier for potential future exploitation.

1. Reconnaissance: Identify services exposing Apache Thrift endpoints over the network using port scanning tools (e.g., nmap) targeting common Thrift ports (e.g., 9090, 9091) or application-specific ports.
2. Identify vulnerable version: Confirm the target is running Apache Thrift before version 0.25.0 by inspecting service banners, dependency manifests, or error responses.
3. Craft malicious Thrift message: Construct a Thrift protocol message (binary, compact, or JSON protocol) containing a collection or string field with an excessively large declared size value — far exceeding the actual payload — exploiting the lack of size validation.
4. Send the payload: Transmit the crafted message to the Thrift service endpoint without any authentication. The service attempts to allocate memory proportional to the declared size.
5. Trigger denial of service: The server exhausts available system memory attempting to fulfill the allocation, causing the Thrift service process to crash or become unresponsive (Red Hat Bugzilla, Github Advisory).

• Network: Unexpected or repeated connections to Thrift service ports (e.g., 9090/tcp) from external or untrusted IP addresses; large-volume or rapid-succession connection attempts to Thrift endpoints.
• Logs: Application logs showing out-of-memory errors or allocation failures in Thrift service processes; sudden service crashes or restarts logged by process supervisors (e.g., systemd, supervisord).
• Process/System: Sudden spike in memory consumption by the Thrift service process visible in system monitoring tools (e.g., top, htop, Prometheus metrics); OOM killer events in /var/log/syslog or dmesg referencing the Thrift service process.

The primary remediation is to upgrade Apache Thrift and all affected language binding packages to version 0.25.0 or later, which enforces proper limits on memory allocation during message deserialization (Github Advisory, Red Hat). As interim workarounds, operators should implement network-level rate limiting and request size validation in front of Thrift service endpoints (e.g., via API gateways or firewalls), and restrict access to Thrift ports to trusted clients only. Monitor memory usage on services running vulnerable Thrift versions for sudden spikes that may indicate exploitation attempts.

Red Hat has tracked the vulnerability in its Bugzilla system with high severity and assigned it to the Product Security DevOps Team, though the CVE status is listed as "Deferred" in Red Hat's advisory (Red Hat, Red Hat Bugzilla). Microsoft acknowledged the vulnerability in its October 2026 Patch Tuesday update guide, noting impact on Azure Linux packages azl3_thrift_0.24.0-1 and azl3_telegraf_1.31.0-33 (Microsoft). The vulnerability was also discussed in the oss-security mailing list and covered in the context of Microsoft's record October 2026 Patch Tuesday, which addressed over 1,400 flaws.