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Apache Thrift EUVDEUVD-2026-49146

| CVE-2026-43871 HIGH
Loop with Unreachable Exit Condition (Infinite Loop) (CWE-835)
2026-07-24 GHSA-8wv5-x4w7-5gww
Apache PHP Python Denial Of Service Java Thrift Suse Red Hat
8.7
CVSS 4.0 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.5 HIGH

Network-exploitable, low attack complexity, no privileges or user interaction required; only availability impact from CPU exhaustion.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (CNA).

CVSS VectorVendor

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Jul 27, 2026 - 12:16 EUVD
Analysis Generated
Jul 26, 2026 - 12:07 vuln.today
CVE Published
Jul 24, 2026 - 22:28 oss-security
CRITICAL

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Denial of service vulnerability in Apache Thrift's TCompactProtocol implementation allows remote attackers to trigger infinite loops when processing malformed varint input, affecting Python, Go, PHP, and Java bindings before version 0.24.0. Exploitation can exhaust CPU resources, making the service unresponsive; no active exploitation or public exploit code is known at this time.

Technical ContextAI

The flaw lies in the variable-length integer (varint) decoder of Thrift's TCompactProtocol wire format. A crafted byte-count prefix can cause the parsing loop to never reach its exit condition, leading to an infinite loop (CWE-835). This affects the libthrift library in languages implementing TCompactProtocol: Python, Go, PHP, and Java, as identified by the CPE strings.

RemediationAI

Upgrade to Apache Thrift 0.24.0 or later, which corrects the varint parsing loop. No official workarounds are documented. If immediate upgrade is not possible, consider switching to a non-vulnerable protocol (e.g., TBinaryProtocol) if appropriate for your service, or restrict network access to Thrift endpoints to trusted sources. Monitor CPU usage for sustained spikes indicative of an attack.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
openSUSE Tumbleweed Fixed

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EUVD-2026-49146 vulnerability details – vuln.today
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