CVE-2018-17199

What it is

In Apache HTTP Server 2.4 release 2.4.37 and prior, mod_session checks the session expiry time before decoding the session. This causes session expiry time to be ignored for mod_session_cookie sessions since the expiry time is loaded when the session is decoded.

At a glance

Exploitability

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

Exploit odds

20.0% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

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

Timeline

1. 2019-01-30 22:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:45 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 20.0% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-01-30 22:29 UTC

Last modified

2026-06-17 01:45 UTC

Exploit probability

20.0% · EPSS, next 30 days

Weakness

CWE-384

Record status

Modified

Affected

• Apache Http Server ≤ 2.4.37
• Debian Linux 8.0
• Debian Linux 9.0
• Netapp Santricity Cloud Connector
• Netapp Storage Automation Store
• Canonical Ubuntu Linux 14.04
• Canonical Ubuntu Linux 16.04
• Canonical Ubuntu Linux 18.04

Attack profile CVSS 3.0 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

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-2018-17199.md and follow it. Check whether this project is affected by CVE-2018-17199. 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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