Vulnerability · Published Oct 29, 2026 · Assigned by VulnCheck

CVE-2026-119028oapi-codegen 2.0.0 before 2.8.1 Code Injection via Non-String Enum Values

High 8.8

In plain English

A high-severity code injection in oapi-codegen from oapi-codegen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 63.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

oapi-codegen 2.0.0 before 2.8.1 contains a code injection vulnerability that allows attackers to inject Go code by supplying non-literal enum entries in integer, number, or boolean schemas. Attackers controlling an OpenAPI document can craft an enum entry that closes the const block in constants.tmpl and injects a func init(), executing code when the generated package is built and imported.

Affected products (as reported)

Vendor	Product	Versions
oapi-codegen	oapi-codegen	2.0.0 – before 2.8.1

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-g2vv-83pm-v2hc) vendor-advisory
Pull Request #2626 patch, issue-tracking
Patch Commit patch
https://github.com/oapi-codegen/oapi-codegen/blob/v2.8.0/pkg/codegen/templates/constants.tmpl#L16 technical-description
https://github.com/oapi-codegen/oapi-codegen/blob/v2.0.0/pkg/codegen/templates/constants.tmpl#L12 technical-description
oapi-codegen v2.8.1 Release Notes release-notes
GitHub Security Advisory (GHSA-xrqw-w576-xgj2) related, vendor-advisory
VulnCheck Advisory: oapi-codegen 2.0.0 before 2.8.1 Code Injection via Non-String Enum Values third-party-advisory