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CVE-2023-42795

Apache Tomcat: Failure during request clean-up leads to sensitive data leaking to subsequent requests

MEDIUM
5.3
CVSS Score
Published: October 10, 2023 at 05:42 PM UTC
Updated: June 17, 2026 at 06:24 AM UTC
3 products affected across 2 vendorsDebian LinuxTomcatAccumulo

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Severity
MEDIUM5.3
Exploit prediction
EPSS 3%
SSVC
No known exploit

Description

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tomcat· Apache
95%
10.1.0-M1 ≤ v ≤ 10.1.1310.1.1 ≤ v < 10.1.1411.0.0-M1 ≤ v ≤ 11.0.0-M118.5.0 ≤ v ≤ 8.5.938.5.0 ≤ v < 8.5.949.0.0-M1 ≤ v ≤ 9.0.809.0.1 ≤ v < 9.0.8110.1.0 milestone110.1.0 milestone1010.1.0 milestone1110.1.0 milestone1210.1.0 milestone1310.1.0 milestone1410.1.0 milestone1510.1.0 milestone1610.1.0 milestone1710.1.0 milestone1810.1.0 milestone1910.1.0 milestone210.1.0 milestone2010.1.0 milestone310.1.0 milestone410.1.0 milestone510.1.0 milestone610.1.0 milestone710.1.0 milestone810.1.0 milestone910.1.0-M111.0.0 milestone111.0.0 milestone1011.0.0 milestone1111.0.0 milestone211.0.0 milestone311.0.0 milestone411.0.0 milestone511.0.0 milestone611.0.0 milestone711.0.0 milestone811.0.0 milestone911.0.0-M18.5.09.0.0 milestone19.0.0 milestone109.0.0 milestone119.0.0 milestone129.0.0 milestone139.0.0 milestone149.0.0 milestone159.0.0 milestone169.0.0 milestone179.0.0 milestone189.0.0 milestone199.0.0 milestone29.0.0 milestone209.0.0 milestone219.0.0 milestone229.0.0 milestone239.0.0 milestone249.0.0 milestone259.0.0 milestone269.0.0 milestone279.0.0 milestone39.0.0 milestone49.0.0 milestone59.0.0 milestone69.0.0 milestone79.0.0 milestone89.0.0 milestone99.0.0-M1
Affected range stops below 10.1.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.5.94, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.81, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 10.0.0-M1 (unknown)
Vendor states this is fixed in 3 (unknown)
Debian Linux· Debiandrupal
95%
10.011.012.0
Accumulo· Apachemaven
60%
10.10-m1 ≤ v ≤ 10.1.138.5.0 ≤ v ≤ 8.5.939.0.0-m1 ≤ v ≤ 9.0.8010.10-m111.0.0-m18.5.09.0.0-m1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

Vendor AdvisoryMailing List
Source: [email protected]
https://lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2023/10/10/9
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2023/10/msg00020.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.netapp.com/advisory/ntap-20231103-0007/
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.debian.org/security/2023/dsa-5521
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.debian.org/security/2023/dsa-5522

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-459

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