CVE-2024-52317Network attack vector

Cross-user traffic mix-up via duplicate object recycling

Published Nov 18, 2024 · Updated Jan 24, 2025

Object recycling errors in affected Apache Tomcat releases allow remote attackers to mix requests or responses between users over HTTP/2. Concurrent stream error handling could invoke Stream.recycle more than once and return the same Coyote request and response objects to a reuse pool while processing continued. The flaw requires HTTP/2 traffic and concurrent error handling; the mix-up can expose one user's response to another or associate a request with the wrong user.

CVSS severity6.5
Medium
EPSS probability2.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object recycling errors in affected Apache Tomcat releases allow remote attackers to mix requests or responses between users over HTTP/2. Concurrent stream error handling could invoke Stream.recycle more than once and return the same Coyote request and response objects to a reuse pool while processing continued. The flaw requires HTTP/2 traffic and concurrent error handling; the mix-up can expose one user's response to another or associate a request with the wrong user.

The record

CVE
CVE-2024-52317
Published
Nov 18, 2024
Updated
Jan 24, 2025
Vendor
The Apache Software Foundation
Product
Apache Tomcat
Classifications
CWE-326
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=10.1.27 <=10.1.30
  2. Affected versionversion=11.0.0-M23 <=11.0.0-M26
  3. Affected versionversion=9.0.92 <=9.0.95

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Tomcatversion=10.1.27 <=10.1.30; version=11.0.0-M23 <=11.0.0-M26; version=9.0.92 <=9.0.95

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

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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-326Inadequate Encryption Strength

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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