CVE-2022-23460: Jsonxx or Json++ is a JSON parser, writer and reader written in C++

Routine

MEDIUM 5.9REMOTEDOWNGRADE

CVE-2022-23460 is a medium-severity flaw (CVSS 5.9) affecting json\+\+. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jsonxx or Json++ is a JSON parser, writer and reader written in C++. In affected versions of jsonxx json parsing may lead to stack exhaustion in an address sanitized (ASAN) build. This issue may lead to Denial of Service if the program using the jsonxx library crashes. This issue exists on the current commit of the jsonxx project and the project itself has been archived. Updates are not expected. Users are advised to find a replacement.

Why this priority

Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-121, CWE-674
Published	2022-08-19
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: hjiang

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

Am I affected?

Timeline

2022-08-19 20:15 UTCPublished CVE record published
2026-06-17 04:30 UTCUpdated Record last modified

hjiang json\+\+ DOWNGRADE

Affected: 1.0.0 · 1.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison json++ sudo apt install json++=<VERSION_BEFORE_1.0.0> sudo apt-mark hold json++

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

dnf --showduplicates list json++ sudo dnf downgrade json++-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add json++

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-2022-23460?

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

Is CVE-2022-23460 being exploited?

CVE-2022-23460 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-2022-23460 affect?

CVE-2022-23460 affects json\+\+. Severity is medium (CVSS 5.9). Jsonxx or Json++ is a JSON parser, writer and reader written in C++. In affected versions of jsonxx json parsing may lead to stack exhaustion in an address sanitized (ASAN) build. This issue may lead to Denial of Service if the program usin

How urgent is CVE-2022-23460?

Priority 39/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-23459 HIGH 8.1 DOWNGRADE Jsonxx or Json++ is a JSON parser, writer and reader written in C++

References

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