CVE-2017-12165

mediumpriority · track · 31EPSS 0.019 · 79 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.86% (79th) EPSS

CVSS 5 · medium

Is it mine?

11 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

It was discovered that Undertow before 1.4.17, 1.3.31 and 2.0.0 processes http request headers with unusual whitespaces which can cause possible http request smuggling.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2.6–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.02.6lowCVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.02.6lowCVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:Nsecondary · secalert@redhat.com USexploitability 1.2 · impact 1.4

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USprimaryCWE-444US

affected products (11)

Products and version ranges known to be affected.

Red Hat undertow≤ 2.0.0enisa_euvdEU
Red Hat undertow≤ 1.3.31enisa_euvdEU
Red Hat undertow≤ 1.4.17enisa_euvdEU
redhat jboss enterprise application platform= 7.0.0nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat jboss enterprise application platform= 7.1.0nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat undertow1.0.0 → 1.3.31nvdUScpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
redhat undertow1.4.0 → 1.4.17nvdUScpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
redhat undertow= 2.0.0nvdUScpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
Maven io.undertow:undertow-core< 1.3.31osvUSpkg:maven/io.undertow/undertow-core
Maven io.undertow:undertow-core1.4.0 → 1.4.17osvUSpkg:maven/io.undertow/undertow-core
Maven io.undertow:undertow-core2.0.0.Alpha1 → 2.0.0.Beta1osvUSpkg:maven/io.undertow/undertow-core

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-5gg7-5wv8-4gcjUndertow Request Smuggling vulnerability2022-05-13ghsa · osvUS
It was discovered that Undertow before 1.4.17, 1.3.31 and 2.0.0 processes http request headers with unusual whitespaces which can cause possible http request smuggling.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2018-07-27modified 2026-06-17

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+548 more

references (31)

External citations — patches, advisories, analysis.

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