CVE-2023-23088: Buffer OverFlow Vulnerability in Barenboim json-parser master and v1.1.0 fixed in v1.1.1 allows an attacker to

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-23088 is a critical-severity flaw (CVSS 9.8) affecting json-parser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer OverFlow Vulnerability in Barenboim json-parser master and v1.1.0 fixed in v1.1.1 allows an attacker to execute arbitrary code via the json_value_parse function.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-787
Published	2023-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: json-parser project

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

Am I affected?

Timeline

2023-02-03 18:15 UTCPublished CVE record published
2026-06-17 05:36 UTCUpdated Record last modified

json-parser project json-parser DOWNGRADE

Affected: 1.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

1. Check installed version

apt-cache policy json-parser || rpm -q json-parser || json-parser --version

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

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

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

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

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-2023-23088?

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

Is CVE-2023-23088 being exploited?

CVE-2023-23088 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-2023-23088 affect?

CVE-2023-23088 affects json-parser. Severity is critical (CVSS 9.8). Buffer OverFlow Vulnerability in Barenboim json-parser master and v1.1.0 fixed in v1.1.1 allows an attacker to execute arbitrary code via the json_value_parse function.

How urgent is CVE-2023-23088?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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