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CVE-2016-2146

22
FAUCET Score

CVE-2016-2146 describes a denial-of-service vulnerability in the am_read_post_data function of mod_auth_mellon versions prior to 0.11.1, affecting Fedora and UNINETT distributions. This flaw allows remote attackers to trigger worker process crashes, web server deadlocks, or excessive memory consumption by sending a large amount of POST data. Rated with a CVSS v3 score of 7.5 (High), it is easily exploitable over the network with low attack complexity and no user interaction, leading to high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
23CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
<= 0.11.0CPE matchmatch criteria
cpe:2.3:a:uninett:mod_auth_mellon:*:*:*:*:*:*:*:*

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
3.40%
Probability of exploitation in next 30 days
EPSS Percentile
87.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0340 is in the 78th percentile among its peer group of 51,485 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 6Fixed in: mod_auth_mellon
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: mod_auth_mellon

Vendor Advisories (1)

redhatCVE-2016-2146Moderate

mod_auth_mellon: Failure to limit amount of POST data submitted by client

Mar 9, 2016

References

lists.fedoraproject.org / pipermail/package-announce/2016-March/179085.html
github.com / UNINETT/mod_auth_mellon/pull/71
Patch
sympa.uninett.no / lists/uninett.no/arc/modmellon/2016-03/msg00000.html