What is CVE-2009-2629?

CVE-2009-2629 is a vulnerability in F5 nginx, classified under Out-of-bounds Write. Published 2009-09-15.

Is CVE-2009-2629 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in F5 nginx

CVE-2009-2629

Buffer underflow in src/http/ngx_http_parse.c in nginx 0.1.0 through 0.5.37, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.15 allows remote attackers to execute arbitrary code via crafted HTTP requests.

Vulnerability class: Buffer Overflow

Published 2009-09-15 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.751 (99.5th percentile), scored 2026-10-17.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.751 · newest: 0.751 · change: 0.000

Affected products

F5 nginx
Debian Linux — versions 4.0, 5.0, 6.0
Fedoraproject Fedora — versions 10, 11, 12

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

www.kb.cert.org/vuls/id/180065 (US Government Resource, Third Party Advisory, third-party-advisory)
www.redhat.com/archives/fedora-package-announce/2009-December/msg00428.html (vendor-advisory, Third Party Advisory)
nginx.net/CHANGES-0.7 (Release Notes, Vendor Advisory)
nginx.net/CHANGES (Release Notes, Vendor Advisory)
sysoev.ru/nginx/patch.180065.txt (Broken Link)
www.debian.org/security/2009/dsa-1884 (vendor-advisory, Third Party Advisory)
www.redhat.com/archives/fedora-package-announce/2009-December/msg00442.html (vendor-advisory, Third Party Advisory)
www.redhat.com/archives/fedora-package-announce/2009-December/msg00449.html (vendor-advisory, Third Party Advisory)
nginx.net/CHANGES-0.5 (Release Notes, Vendor Advisory)
nginx.net/CHANGES-0.6 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2009-2629?: CVE-2009-2629 is a vulnerability in F5 nginx, classified under Out-of-bounds Write. Published 2009-09-15.
Is CVE-2009-2629 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.