CVE-2019-20933: InfluxDB before 1.7.6 has an authentication bypass vulnerability in the authenticate function in services/http

Q: How do I fix CVE-2019-20933?

influxdb: upgrade to 1.7.6; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-20933 being exploited?

CVE-2019-20933 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-20933 affect?

CVE-2019-20933 affects influxdb, debian linux. Severity is critical (CVSS 9.8). InfluxDB before 1.7.6 has an authentication bypass vulnerability in the authenticate function in services/httpd/handler.go because a JWT token may have an empty SharedSecret (aka shared secret).

Q: How urgent is CVE-2019-20933?

Priority 69/100. Critical severity; EPSS top 2%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2019-20933 is a critical-severity flaw (CVSS 9.8) affecting influxdb, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

InfluxDB before 1.7.6 has an authentication bypass vulnerability in the authenticate function in services/httpd/handler.go because a JWT token may have an empty SharedSecret (aka shared secret).

Why this priority

Critical severity
EPSS top 2%: very likely to be exploited
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	30.9% (top 2%)
CISA exploited list	No
Weakness	CWE-287
Published	2020-11-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · influxdata

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-19 02:15 UTCPublished CVE record published
2026-06-17 02:31 UTCUpdated Record last modified

influxdata influxdb UPGRADE

Affected: < 1.7.6

Fixed in: 1.7.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy influxdb || rpm -q influxdb || influxdb --version

2. UPGRADE to 1.7.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade influxdb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade influxdb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: InfluxDB <1.7.6 - Authentication Bypass

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-20933?

influxdb: upgrade to 1.7.6; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-20933 being exploited?

CVE-2019-20933 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-20933 affect?

CVE-2019-20933 affects influxdb, debian linux. Severity is critical (CVSS 9.8). InfluxDB before 1.7.6 has an authentication bypass vulnerability in the authenticate function in services/httpd/handler.go because a JWT token may have an empty SharedSecret (aka shared secret).

How urgent is CVE-2019-20933?

Priority 69/100. Critical severity; EPSS top 2%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache HTTP Server vulnerabilities · Debian vulnerabilities

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CVE-2018-17572 MEDIUM 4.8 UPGRADE InfluxDB 0.9.5 has Reflected XSS in the Write Data module.

References

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