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CVE-2026-58389: Apache Thrift: Rust binary protocol non-strict path missing string size limit

highCVSS 7.5CVE-2026-58389

CSIRTS triage

vendor: Apacheproduct: ThriftDenial of service
What
Rust implementation of Thrift binary protocol in non-strict mode does not enforce string size limits, enabling denial of service through oversized strings.
Who is affected
Applications using Apache Thrift Rust library with binary protocol in non-strict mode.
Urgency
High priority; allows remote denial of service via resource exhaustion, currently not exploited but high CVSS score indicates significant impact.
Action
Update Apache Thrift to a patched version that enforces string size limits in non-strict binary protocol mode.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.5
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58389

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-2026-58389coverage & 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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