Vulnerability · Published Oct 17, 2026 · Assigned by VulnCheck

CVE-2026-111933Coder before 2.34.2 User Enumeration via Login Placeholder Hash

Low 3.7

In plain English

A low-severity security flaw in coder from coder. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.2%top 86.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a user enumeration vulnerability because userpassword.Compare() substitutes a placeholder hash derived from the string "hunter2" when a stored password hash is empty. Unauthenticated attackers can submit logins with the password "hunter2" and distinguish HTTP 403 from 401 responses to enumerate valid accounts and reveal the authentication provider of SSO-only users.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/coder/coder	no fix listed	GO-2026-6265
Go	github.com/coder/coder/v2	2.34.2	GHSA-8fxq-53rx-ph5f
Go	github.com/coder/coder/v2	2.33.8	GHSA-8fxq-53rx-ph5f
Go	github.com/coder/coder/v2	2.32.7	GHSA-8fxq-53rx-ph5f
Go	github.com/coder/coder/v2	2.29.17	GHSA-8fxq-53rx-ph5f
Go	github.com/coder/coder/v2	2.29.17, 2.32.7, 2.33.8, 2.34.2	GO-2026-6265

Affected products (as reported)

Vendor	Product	Versions
coder	coder	2.34.0 – before 2.34.2
coder	coder	2.33.0 – before 2.33.8
coder	coder	2.30.0 – before 2.32.7
coder	coder	0 – before 2.29.17

Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

GitHub Security Advisory (GHSA-8fxq-53rx-ph5f) vendor-advisory
VulnCheck Advisory: Coder before 2.34.2 User Enumeration via Login Placeholder Hash third-party-advisory