The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0…
Priority HIGH 75CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow.
Why it matters now
EPSS 0.87475 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* | 1.3.9 – 1.4.0 | Vulnerable | F5 |
| cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:* | 19 | Vulnerable | Fedoraproject |
- cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* Versions 1.3.9 – 1.4.0 Vulnerable ·F5
- cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:* Versions 19 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2013-2028
- 2026-10-03 Alias added: GHSA-68mc-8233-5xrw
References
Patch 3
Advisory 2
Sources
- CVE-2013-2028 · CVE Program
- CVE-2013-2028 · NVD
- FIRST EPSS
- GHSA-68mc-8233-5xrw · GitHub Advisory Database · CC BY 4.0
- CVE-2013-2028 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences