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CVE-2018-12541

22
FAUCET Score

CVE-2018-12541 affects Eclipse Vert.x versions 3.0.0 to 3.5.3, where its WebSocket HTTP upgrade implementation buffers entire HTTP request bodies in memory before the handshake. This can lead to a denial of service due to excessive memory consumption if large requests are sent. With a CVSS score of 6.5 (Medium), this vulnerability is remotely exploitable with low attack complexity, requiring only low privileges to trigger a high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 3.5.4CPE matchmatch criteria
cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.65%
Probability of exploitation in next 30 days
EPSS Percentile
84.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0265 is in the 94th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: io.vertx:vertx-coreFixed in: 3.5.4
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.7.0Fixed in: vertx-core
View patch
redhatpatch availablevia redhat_api
Product: Text-Only RHOARFixed in: vert-core
View patch

Vendor Advisories (2)

mavenGHSA-45xm-v8gq-7jqxmedium

Excessive memory allocation

Oct 17, 2018
redhatCVE-2018-12541Moderate

vertx: WebSocket HTTP upgrade implementation holds the entire http request in memory before the handshake

Oct 3, 2018

References

access.redhat.com / errata/RHSA-2018:2946
Third Party Advisory
bugs.eclipse.org / bugs/show_bug.cgi
Vendor Advisory
github.com / eclipse-vertx/vert.x/issues/2648
Third Party Advisory
lists.apache.org / thread.html/r01123837ffbfdf5809e0a4ac354ad546e4ca8f18df89ee5a10eeb81b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/r11789cd6d67ecca2d6f6bbb11e34495e68ee99287b6c59edf5b1a09c%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/r1af71105539fe01fcecb92d2ecd8eea56c515fb1c80ecab4df424553%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/r344235b1aea2f7fa2381495df1d77d02b595e3d7e4626e701f7c1062%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/r362835e6c7f34324ed24e318b363fcdd20cea91d0cea0b2e1164f73e%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/r3da899890536af744dec897fbc561fd9810ac45e79a16164b53c31b2%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/r79789a0afb184abd13a2c07016e6e7ab8e64331f332b630bf82a2eed%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/r8db0431ecf93f2dd2128db5ddca897b33ba883b7f126648d6a9e4c47%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/r98dc06e2b1c498d0e9eb5038d8e1aefd24e411e50522e7082dd9e0b7%40%3Ccommits.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rbdc279ecdb7ac496a03befb05a53605c4ce2b67e14f8f4df4cfa1203%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/re5ddabee26fbcadc7254d03a5a073d64080a9389adc9e452529664ed%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/reb3cc4f3e10264896a541813c0030ec9d9466ba9b722fe5d4adc91cd%40%3Cissues.bookkeeper.apache.org%3E