How severe is CVE-2016-2146?

CVE-2016-2146 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-2146 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-2146?

CVE-2016-2146 primarily affects Uninett Mod Auth Mellon. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-2146?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-2146 published?

CVE-2016-2146 was published on 2016-04-15 and last updated on 2026-06-17.

CVE-2016-2146

CVE-2016-2146 is a high-severity vulnerability in Uninett Mod Auth Mellon with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Uninett Mod Auth Mellon
Published: 2016-04-15
Last modified: 2026-06-17

Description

The am_read_post_data function in mod_auth_mellon before 0.11.1 does not limit the amount of data read, which allows remote attackers to cause a denial of service (worker process crash, web server deadlock, or memory consumption) via a large amount of POST data.

Frequently asked questions

What is CVE-2016-2146?: The am_read_post_data function in mod_auth_mellon before 0.11.1 does not limit the amount of data read, which allows remote attackers to cause a denial of service (worker process crash, web server deadlock, or memory consumption) via a large amount of POST data.
How severe is CVE-2016-2146?: CVE-2016-2146 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-2146 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-2146?: CVE-2016-2146 primarily affects Uninett Mod Auth Mellon. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-2146?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-2146 published?: CVE-2016-2146 was published on 2016-04-15 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
cpe:2.3:a:uninett:mod_auth_mellon:*:*:*:*:*:*:*:*

More vulnerabilities in Uninett Mod Auth Mellon

CVE-2014-8567 — Critical (CVSS 9.4): The mod_auth_mellon module before 0.8.1 allows remote attackers to cause a denial of service (Apache HTTP server crash)…
CVE-2016-2145 — High (CVSS 7.5): The am_read_post_data function in mod_auth_mellon before 0.11.1 does not check if the ap_get_client_block function…
CVE-2014-8566 — Medium (CVSS 6.4): The mod_auth_mellon module before 0.8.1 allows remote attackers to obtain sensitive information or cause a denial of…
CVE-2021-3639 — Medium (CVSS 6.1): A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an…
CVE-2017-6807 — Medium (CVSS 6.1): mod_auth_mellon before 0.13.1 is vulnerable to a Cross-Site Session Transfer attack, where a user with access to one…

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