CVE-2018-12537

mediumpriority · track · 32EPSS 0.025 · 85 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

2.48% (85th) EPSS

CVSS 5 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

In Eclipse Vert.x version 3.0 to 3.5.1, the HttpServer response headers and HttpClient request headers do not filter carriage return and line feed characters from the header value. This allow unfiltered values to inject a new header in the client request or server response.

cvss

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

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

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

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.05mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-93USCWE-93US

exploits (1)

Public proof-of-concept and weaponised exploit code.

tafamace/CVE-2018-12537tafamace/CVE-2018-12537PoC · poc_in_github

affected products (4)

Products and version ranges known to be affected.

The Eclipse Foundation Eclipse Vert.x≤ unspecified ≤3.5.1enisa_euvdEU
The Eclipse Foundation Eclipse Vert.x3.0 → unspecifiedenisa_euvdEU
eclipse vert.x3.0.0 → 3.5.1nvdUScpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*
Maven io.vertx:vertx-core3.0.0 → 3.5.2osvUSpkg:maven/io.vertx/vertx-core

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-6cw8-7j6c-hccpModerate severity vulnerability that affects io.vertx:vertx-core2018-10-19ghsa · osvUS
In Eclipse Vert.x version 3.0 to 3.5.1, the HttpServer response headers and HttpClient request headers do not filter carriage return and line feed characters from the header value. This allow unfiltered values to inject a new header in the client request or server response.

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 2018-08-14modified 2026-06-17

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+25188 more

references (21)

External citations — patches, advisories, analysis.

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