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CVE-2019-16764

18
FAUCET Score

CVE-2019-16764 is a denial-of-service vulnerability affecting PowAssent, specifically in the PowAssent.Phoenix.AuthorizationController. It arises from the unsafe use of String.to_atom/1 with user-provided input, allowing an attacker to exhaust the atom table and crash the application. Rated 5.5 MEDIUM, this vulnerability has a low attack complexity and requires local privileges, leading to a high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.4.4CPE matchmatch criteria
cpe:2.3:a:powauth:powassent:*:*:*:*:*:*:*:*

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
1.08%
Probability of exploitation in next 30 days
EPSS Percentile
61.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0108 is in the 97th percentile among its peer group of 15,937 CVEs.

Social Chatter

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

Remediation

Patch Available

Vendor Patches (2)

erlangpatch availablevia ghsa
Product: pow_assentFixed in: 0.4.4
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

erlangGHSA-5653-437f-5hmcmedium

Denial of service

Apr 12, 2022

References

erlang.org / doc/efficiency_guide/commoncaveats.html
Product
github.com / pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf
Patch
github.com / pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986
Third Party Advisory
hex.pm / packages/pow_assent
Release Notes