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CVE-2018-6196

25
FAUCET Score

CVE-2018-6196 describes an infinite recursion flaw in w3m through version 0.5.3, specifically within the HTMLlineproc0 function due to improper handling of negative indent values in feed_table_block_tag. This vulnerability carries a CVSS score of 7.5 (High), indicating a network-exploitable flaw with low attack complexity that can lead to high availability impact. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and it lacks significant community discussion or media coverage, its potential to cause denial of service should be noted.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.5.3CPE matchmatch criteria
cpe:2.3:a:tats:w3m:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
17.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.94%
Probability of exploitation in next 30 days
EPSS Percentile
85.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0294 is in the 74th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: w3m
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: w3m

Vendor Advisories (1)

redhatCVE-2018-6196Low

w3m: Infinite recursion in HTMLlineproc0

Jan 23, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-04/msg00028.html
github.com / tats/w3m/commit/8354763b90490d4105695df52674d0fcef823e92
PatchThird Party Advisory
github.com / tats/w3m/issues/88
ExploitPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/04/msg00025.html
usn.ubuntu.com / 3555-1
Third Party Advisory
usn.ubuntu.com / 3555-2
Third Party Advisory