CVE-2023-34981

What it is

A regression in the fix for bug 66512 in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74 and 8.5.88 meant that, if a response did not include any HTTP headers no AJP SEND_HEADERS messare woudl be sent for the response which in turn meant that at least one AJP proxy (mod_proxy_ajp) would use the response headers from the previous request leading to an information leak.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure.

Exploit odds

1.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2023-06-21 11:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 06:04 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.1% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-06-21 11:15 UTC

Last modified

2026-06-17 06:04 UTC

Exploit probability

1.1% · EPSS, next 30 days

Weakness

CWE-732 · Incorrect permission assignment

Record status

Modified

Affected

• Apache Tomcat 8.5.88
• Apache Tomcat 9.0.74
• Apache Tomcat 10.1.8
• Apache Tomcat 11.0.0

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-34981.md and follow it. Check whether this project is affected by CVE-2023-34981. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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