CVE-2020-13949Network attack vector

Service interruption via oversized container declarations

Published Feb 12, 2021 · Updated Aug 4, 2024

Resource exhaustion in Apache Thrift 0.9.3 through 0.13.0 allows remote attackers to exhaust RPC service memory with a short message. Affected protocol readers accept a declared container size larger than the remaining payload and allocate memory for that declared size before rejecting the truncated input. Exposure requires an application using an affected Thrift runtime to accept untrusted RPC traffic; memory exhaustion interrupts that service without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability6.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Resource exhaustion in Apache Thrift 0.9.3 through 0.13.0 allows remote attackers to exhaust RPC service memory with a short message. Affected protocol readers accept a declared container size larger than the remaining payload and allocate memory for that declared size before rejecting the truncated input. Exposure requires an application using an affected Thrift runtime to accept untrusted RPC traffic; memory exhaustion interrupts that service without reported data disclosure or modification.

The record

CVE
CVE-2020-13949
Published
Feb 12, 2021
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache Thrift
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Apache Thrift 0.9.3 to 0.13.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Thriftversion=Apache Thrift 0.9.3 to 0.13.0

Published CVSS scores

5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo