CVE-2017-7657

What it is

In Eclipse Jetty, versions 9.2.x and older, 9.3.x (all configurations), and 9.4.x (non-default configuration with RFC2616 compliance enabled), transfer-encoding chunks are handled poorly. The chunk length parsing was vulnerable to an integer overflow. Thus a large chunk size could be interpreted as a smaller chunk size and content sent as chunk body could be interpreted as a pipelined request. If Jetty was deployed behind an intermediary that imposed some authorization and that intermediary allowed arbitrarily large chunks to be passed on unchanged, then this flaw could be used to bypass the authorization imposed by the intermediary as the fake pipelined request would not be interpreted by the intermediary as a request.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

14.4% 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. 2018-06-26 16:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:24 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 14.4% in the next 30 days (EPSS).
• Severity: 9.8 CRITICAL (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2018-06-26 16:29 UTC

Last modified

2026-06-17 01:24 UTC

Exploit probability

14.4% · EPSS, next 30 days

Weakness

CWE-444

Record status

Modified

Affected

• Eclipse Jetty ≤ 9.2.26
• Eclipse Jetty < 9.3.24
• Eclipse Jetty < 9.4.11
• Debian Linux 9.0
• Netapp e-series Santricity Management
• Netapp e-series Santricity Os Controller ≤ 11.50.1
• Netapp e-series Santricity Web Services
• Netapp Element Software

Attack profile CVSS 3.1 · 9.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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-2017-7657.md and follow it. Check whether this project is affected by CVE-2017-7657. 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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