CVE-2019-16201
No exploitation reported by the sources we read.
- Published2019-11-26
- WeaknessCWE-287
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.
Timeline
dates in UTC- 2019-11-2618:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-16201?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-16201?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.4 | ≥ 2.4.0, ≤ 2.4.7 | no fix published | NVD |
| 2.5 | ≥ 2.5.0, ≤ 2.5.6 | no fix published | NVD |
| 2.6 | ≥ 2.6.0, ≤ 2.6.4 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.0 | = 8.0 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- rubygem-abrtAlmaLinux:8all versions · fixed in 0.3.0-4.module_el8.5.0+259+8cec6917and 1 other package
- rubygem-abrtAlmaLinux:8all versions · fixed in 0.3.0-4.module_el8.5.0+2623+08a8ba32and 1 other package
- rubygem-abrtAlmaLinux:8all versions · fixed in 0.3.0-4.module_el8.5.0+2625+ec418553and 1 other package
- rubygem-bsonAlmaLinux:8all versions · fixed in 4.3.0-2.module_el8.5.0+259+8cec6917and 1 other package
- rubygem-bsonAlmaLinux:8all versions · fixed in 4.3.0-2.module_el8.5.0+2625+ec418553and 1 other package
- rubygem-bsonAlmaLinux:8all versions · fixed in 4.5.0-1.module_el8.5.0+250+ba22dbf7and 1 other package
- rubygem-bsonAlmaLinux:8all versions · fixed in 4.5.0-1.module_el8.5.0+2623+08a8ba32and 1 other package
- rubygem-mongoAlmaLinux:8all versions · fixed in 2.5.1-2.module_el8.5.0+259+8cec6917and 1 other package
11 more package ranges on OSV.dev
Fix
No fix published by the sources we read yet. NVD record
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.07.8read 2026-10-23
- NVDweakness (CWE)CWE-287read 2026-10-23
- FIRST EPSSEPSS score5.1 %2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2019-11-26
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2019-16201?
Is CVE-2019-16201 actively exploited?
What is the CVSS score for CVE-2019-16201?
Running rubygem-pg? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.