CVE-2016-4425: Jansson 2.7 and earlier allows context-dependent attackers to cause a denial of service (deep recursion, stack

Q: How do I fix CVE-2016-4425?

jansson: upgrade to newer than 2.7. Exact commands for each OS are on this page.

Q: Is CVE-2016-4425 being exploited?

CVE-2016-4425 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-2016-4425 affect?

CVE-2016-4425 affects jansson. Severity is medium (CVSS 6.5). Jansson 2.7 and earlier allows context-dependent attackers to cause a denial of service (deep recursion, stack consumption, and crash) via crafted JSON data.

Q: How urgent is CVE-2016-4425?

Priority 43/100. No elevated risk signals yet.

This month

MEDIUM 6.5UPGRADE

CVE-2016-4425 is a medium-severity flaw (CVSS 6.5) affecting jansson. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jansson 2.7 and earlier allows context-dependent attackers to cause a denial of service (deep recursion, stack consumption, and crash) via crafted JSON data.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-20, CWE-674
Published	2016-05-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jansson project

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

Am I affected?

Timeline

2016-05-17 14:08 UTCPublished CVE record published
2026-06-17 00:47 UTCUpdated Record last modified

jansson project jansson UPGRADE

Affected: <= 2.7

Fixed in: newer than 2.7

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jansson

Note

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

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-2016-4425?

jansson: upgrade to newer than 2.7. Exact commands for each OS are on this page.

Is CVE-2016-4425 being exploited?

CVE-2016-4425 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-2016-4425 affect?

CVE-2016-4425 affects jansson. Severity is medium (CVSS 6.5). Jansson 2.7 and earlier allows context-dependent attackers to cause a denial of service (deep recursion, stack consumption, and crash) via crafted JSON data.

How urgent is CVE-2016-4425?

Priority 43/100. No elevated risk signals yet.

Related CVEs

CVE-2020-36325 HIGH 7.5 UPGRADE An issue was discovered in Jansson through 2.13.1
CVE-2013-6401 MEDIUM 5.0 UPGRADE Jansson, possibly 2.4 and earlier, does not restrict the ability to trigger hash collisions predictably, which

References

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