What is CVE-2019-20138?

CVE-2019-20138 is a high-severity vulnerability in HTTP Authentication Library Project, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2019-12-30.

How severe is CVE-2019-20138?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in HTTP Authentication Library Project

CVE-2019-20138

The HTTP Authentication library before 2019-12-27 for Nim has weak password hashing because the default algorithm for libsodium's crypto_pwhash_str is not used.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2019-12-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

HTTP Authentication Library Project

Weakness classification (CWE)

References

github.com/FedericoCeratto/nim-httpauth/commit/15fd0686dc363075c08976ad897d6c92… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-20138?: CVE-2019-20138 is a high-severity vulnerability in HTTP Authentication Library Project, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2019-12-30.
How severe is CVE-2019-20138?: High severity. CVSS v3 base score is 7.5 out of 10.