No exploitation reportedFix available

CVE-2017-7656

Q: Is CVE-2017-7656 actively exploited?

Active exploitation of CVE-2017-7656 has not been confirmed. Its EPSS score was 6.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2017-7656?

CVE-2017-7656 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

No exploitation reported by the sources we read.

Published2018-06-26
Fixed in9.4.11 · 9.3.24
WeaknessCWE-444

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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), HTTP/0.9 is handled poorly. An HTTP/1 style request line (i.e. method space URI space version) that declares a version of HTTP/0.9 was accepted and treated as a 0.9 request. If deployed behind an intermediary that also accepted and passed through the 0.9 version (but did not act on it), then the response sent could be interpreted by the intermediary as HTTP/1 headers. This could be used to poison the cache if the server allowed the origin client to generate arbitrary content in the response.

Timeline

dates in UTC

2018-06-2615:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-7656?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-7656?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Eclipse jetty

Branch	Affected	Fixed in	Source
9.4	≥ 9.4.0, < 9.4.11	9.4.11	NVD
9.3	≥ 9.3.0, < 9.3.24	9.3.24	NVD
9.2	≤ 9.2.26	no fix published	NVD

jetty-server

Branch	Affected	Fixed in	Source
9.4	≥ 9.4.0, < 9.4.11.v20180605	9.4.11.v20180605	OSV
9.3	< 9.3.24.v20180605	9.3.24.v20180605	OSV

Debian debian linux

Branch	Affected	Fixed in	Source
9.0	= 9.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Eclipse jetty to 9.4.11 · 9.3.24

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-444read 2026-10-23
FIRST EPSSEPSS score6.3 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: 2018-06-26
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-7656?

Is CVE-2017-7656 actively exploited?

Active exploitation of CVE-2017-7656 has not been confirmed. Its EPSS score was 6.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-7656?

CVE-2017-7656 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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