CVE-2020-36325: An issue was discovered in Jansson through 2.13.1

Q: How do I fix CVE-2020-36325?

jansson: upgrade to newer than 2.13.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-36325 being exploited?

CVE-2020-36325 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-2020-36325 affect?

CVE-2020-36325 affects jansson. Severity is high (CVSS 7.5). An issue was discovered in Jansson through 2.13.1. Due to a parsing error in json_loads, there's an out-of-bounds read-access bug. NOTE: the vendor reports that this only occurs when a programmer fails to follow the API specification

Q: How urgent is CVE-2020-36325?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2020-36325 is a high-severity flaw (CVSS 7.5) affecting jansson. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Jansson through 2.13.1. Due to a parsing error in json_loads, there's an out-of-bounds read-access bug. NOTE: the vendor reports that this only occurs when a programmer fails to follow the API specification

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-125
Published	2021-04-26
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

2021-04-26 18:15 UTCPublished CVE record published
2026-06-17 03:15 UTCUpdated Record last modified

jansson project jansson UPGRADE

Affected: <= 2.13.1

Fixed in: newer than 2.13.1

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 2.13.1 (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-2020-36325?

jansson: upgrade to newer than 2.13.1. Exact commands for each OS are on this page.

Is CVE-2020-36325 being exploited?

CVE-2020-36325 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-2020-36325 affect?

CVE-2020-36325 affects jansson. Severity is high (CVSS 7.5). An issue was discovered in Jansson through 2.13.1. Due to a parsing error in json_loads, there's an out-of-bounds read-access bug. NOTE: the vendor reports that this only occurs when a programmer fails to follow the API specification

How urgent is CVE-2020-36325?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2016-4425 MEDIUM 6.5 UPGRADE Jansson 2.7 and earlier allows context-dependent attackers to cause a denial of service (deep recursion, stack
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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