UpHeron
All vulnerabilities

Servers and applications

CVE-2026-55233

OpenResty is a high performance web platform. From 1.29.2.1 to before 1.29.2.5, an out-of-bounds write vulnerability exists in the upstream PROXY protocol v2 implementation. When OpenResty is configured to send PROXY protocol version 2 headers to upstream servers, constructing the header in the stream proxy protocol v2 patch can write beyond the bounds of the allocated buffer, causing the worker…

Severity
High 7.5
Published
10 Jul 2026
Last changed
14 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.29.2.5
Sources
NVD

Affected software

SoftwareAffected versions
OpenRestyServers and applications · cpe:a:openresty:openresty
  • From 1.29.2.1 before 1.29.2.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-55233
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-55233