Jansson, possibly 2.4 and earlier, does not restrict the ability to trigger hash…
Priority LOW 27CWE-310Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.02007 80th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jansson_project:jansson:*:*:*:*:*:*:*:* | up to 2.4 | Vulnerable | Jansson Project |
| cpe:2.3:a:jansson_project:jansson:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | Jansson Project |
| cpe:2.3:a:jansson_project:jansson:2.0.1:*:*:*:*:*:*:* | 2.0.1 | Vulnerable | Jansson Project |
| cpe:2.3:a:jansson_project:jansson:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | Jansson Project |
| cpe:2.3:a:jansson_project:jansson:2.2:*:*:*:*:*:*:* | 2.2 | Vulnerable | Jansson Project |
| cpe:2.3:a:jansson_project:jansson:2.2.1:*:*:*:*:*:*:* | 2.2.1 | Vulnerable | Jansson Project |
| cpe:2.3:a:jansson_project:jansson:2.3:*:*:*:*:*:*:* | 2.3 | Vulnerable | Jansson Project |
| cpe:2.3:a:jansson_project:jansson:2.3.1:*:*:*:*:*:*:* | 2.3.1 | Vulnerable | Jansson Project |
- cpe:2.3:a:jansson_project:jansson:*:*:*:*:*:*:*:* Versions up to 2.4 Vulnerable ·Jansson Project
- cpe:2.3:a:jansson_project:jansson:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Jansson Project
- cpe:2.3:a:jansson_project:jansson:2.0.1:*:*:*:*:*:*:* Versions 2.0.1 Vulnerable ·Jansson Project
- cpe:2.3:a:jansson_project:jansson:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·Jansson Project
- cpe:2.3:a:jansson_project:jansson:2.2:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·Jansson Project
- cpe:2.3:a:jansson_project:jansson:2.2.1:*:*:*:*:*:*:* Versions 2.2.1 Vulnerable ·Jansson Project
- cpe:2.3:a:jansson_project:jansson:2.3:*:*:*:*:*:*:* Versions 2.3 Vulnerable ·Jansson Project
- cpe:2.3:a:jansson_project:jansson:2.3.1:*:*:*:*:*:*:* Versions 2.3.1 Vulnerable ·Jansson Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2013-6401
- 2026-10-03 Alias added: GHSA-qjq9-rwgx-jjhc
References
More Jansson Project Jansson vulnerabilities
- TI-2016-03801 Jansson 2.7 and earlier allows context-dependent attackers to cause a denial of service… CVSS 3.1MEDIUM 6.5
- TI-2020-18608 An issue was discovered in Jansson through 2.13.1. CVSS 3.1HIGH 7.5
Sources
- CVE-2013-6401 · CVE Program
- CVE-2013-6401 · NVD
- FIRST EPSS
- GHSA-qjq9-rwgx-jjhc · GitHub Advisory Database · CC BY 4.0
- CVE-2013-6401 · Red Hat security data · CC BY 4.0
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