CVE-2026-58662: Apache Thrift: C++ THeaderTransport::readString() info-header length bounds bypass

criticalCVSS 9.1CVE-2026-58662

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-2026-58662

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.

Moderate exploitation riskCVE-2026-586621.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 64% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58662	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

criticalCVE-2026-58662: Improper Validation of Specified Quantity in Input, Out-of-bounds Read vulnerability in Apache…nvd

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.

highCVE-2026-58389: Apache Thrift: Rust binary protocol non-strict path missing string size limitmsrc · 2026-08-06
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highCVE-2026-41602: Apache Thrift: Go TFramedTransport uint32 overflowmsrc · 2026-08-06
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