CVE-2013-6401

Jansson, possibly 2.4 and earlier, does not restrict the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted JSON document.

Published: 2014-03-21 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-6401 is rated Low Risk (38.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.34%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-6401

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.88% 0.34% -0.54%
2 2025-03-29 0.34% 0.88% +0.54%
3 2025-03-17 — 0.34% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-6401

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2013-6401

OS Trackers for CVE-2013-6401

vendor priority summary link
debian not yet assigned CVE-2013-6401 not yet assigned priority: Debian including 1 source packages (jansson), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-6401
redhat medium — https://access.redhat.com/security/cve/CVE-2013-6401
suse medium — https://www.suse.com/security/cve/CVE-2013-6401/
ubuntu medium CVE-2013-6401 medium priority: Ubuntu including 1 source packages (jansson), 14 status rows across 14 suites (artful, bionic, lucid, precise, quantal, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 8, ignored 3, released 2, DNE 1. https://ubuntu.com/security/CVE-2013-6401

Affected software / configurations for CVE-2013-6401

Vendor Product Version Raw CPE
jansson_project jansson <= 2.4 cpe:2.3:a:jansson_project:jansson:*:*:*:*:*:*:*:*
jansson_project jansson 2.0 cpe:2.3:a:jansson_project:jansson:2.0:*:*:*:*:*:*:*
jansson_project jansson 2.0.1 cpe:2.3:a:jansson_project:jansson:2.0.1:*:*:*:*:*:*:*
jansson_project jansson 2.1 cpe:2.3:a:jansson_project:jansson:2.1:*:*:*:*:*:*:*
jansson_project jansson 2.2 cpe:2.3:a:jansson_project:jansson:2.2:*:*:*:*:*:*:*
jansson_project jansson 2.2.1 cpe:2.3:a:jansson_project:jansson:2.2.1:*:*:*:*:*:*:*
jansson_project jansson 2.3 cpe:2.3:a:jansson_project:jansson:2.3:*:*:*:*:*:*:*
jansson_project jansson 2.3.1 cpe:2.3:a:jansson_project:jansson:2.3.1:*:*:*:*:*:*:*

References for CVE-2013-6401

cvelogic Threat Intelligence