CVE-2017-16023: Decamelize is used to convert a dash/dot/underscore/space separated string to camelCase

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2017-16023 is a high-severity flaw (CVSS 7.5) affecting decamelize. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Decamelize is used to convert a dash/dot/underscore/space separated string to camelCase. Decamelize 1.1.0 through 1.1.1 uses regular expressions to evaluate a string and takes unescaped separator values, which can be used to create a denial of service attack.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-400, CWE-20
Published	2018-06-04
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: decamelize project

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

Am I affected?

Timeline

2018-06-04 19:29 UTCPublished CVE record published
2026-06-17 01:08 UTCUpdated Record last modified

decamelize project decamelize DOWNGRADE

Affected: 1.1.0 · 1.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.1.0 (Debian / Ubuntu)

apt-cache madison decamelize sudo apt install decamelize=<VERSION_BEFORE_1.1.0> sudo apt-mark hold decamelize

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list decamelize sudo dnf downgrade decamelize-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add decamelize

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2017-16023?

decamelize: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-16023 being exploited?

CVE-2017-16023 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-2017-16023 affect?

CVE-2017-16023 affects decamelize. Severity is high (CVSS 7.5). Decamelize is used to convert a dash/dot/underscore/space separated string to camelCase. Decamelize 1.1.0 through 1.1.1 uses regular expressions to evaluate a string and takes unescaped separator values, which can be used to create a denial

How urgent is CVE-2017-16023?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs