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CVE-2026-91135: Product identification pending

Severity

9.2 (CRITICAL)

Vendor

APACHE

Affected versions

Before 0.25.0.

Fixed version

0.25.0

Patch status

Patched

Published

2026-10-02T11:17:37.277

Modified

2026-10-02T11:17:37.277

Why it matters

Critical vulnerability requiring immediate validation against your environment.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Compare installed versions against the affected version range in the advisory.
• Treat internet-facing systems as higher priority.

Technical summary

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport. When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.

View the official NVD record for CVE-2026-91135

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.