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CVE-2026-58023: Apache Thrift: c_glib heap out-of-bounds read in transport leftover-bytes path

criticalCVSS 9.1CVE-2026-58023

CSIRTS triage

What
The c_glib transport has a heap out-of-bounds read in the leftover-bytes handling path.
Who is affected
Applications using Apache Thrift c_glib transport bindings with untrusted or malformed input.
Urgency
Critical; CVSS 9.1 and out-of-bounds read can lead to information disclosure or crash.
Action
Upgrade Apache Thrift to patched version or restrict input validation before passing to c_glib transport.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.1
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58023

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-58023coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Apache Thrift

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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