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TI-2026-76138 Aliases CVE-2026-111933GHSA-wwfw-5crg-94f6

User enumeration via login placeholder hash in Coder

Priority LOW 27CWE-203Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-203.

Summary

Coder before 2.29.17, from 2.30.0 before 2.32.7, from 2.33.0 before 2.33.8, and from 2.34.0 before 2.34.2 contains a user enumeration flaw (CWE-203). The password comparison in userpassword.Compare() substitutes a placeholder hash when a stored password hash is empty. An unauthenticated attacker can tell valid accounts apart from invalid ones by the login response codes and learn the sign-in provider of SSO-only users.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00225 13th percentileScored 2026-11-07
Fix Fixed coder (coder): 2.34.2, 2.33.8, 2.32.7 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
codercoder2.34.0 to before 2.34.22.34.2Patch availableCNA
codercoder2.33.0 to before 2.33.82.33.8Patch availableCNA
codercoder2.30.0 to before 2.32.72.32.7Patch availableCNA
codercoderbefore 2.29.172.29.17Patch availableCNA
  • coder Vendorcoder Affected 2.34.0 to before 2.34.2 Fixed in 2.34.2 Patch available CNA
  • coder Vendorcoder Affected 2.33.0 to before 2.33.8 Fixed in 2.33.8 Patch available CNA
  • coder Vendorcoder Affected 2.30.0 to before 2.32.7 Fixed in 2.32.7 Patch available CNA
  • coder Vendorcoder Affected before 2.29.17 Fixed in 2.29.17 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*——coder
  • cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:* Versions — — ·coder

Remediation

Upgrade Coder to 2.29.17, 2.32.7, 2.33.8, or 2.34.2, matching the release branch in use.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA coder (coder) Fixed in 2.34.2
  • Fix · CNA coder (coder) Fixed in 2.33.8
  • Fix · CNA coder (coder) Fixed in 2.32.7
  • Fix · CNA coder (coder) Fixed in 2.29.17

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    coder 2.29.17, 2.32.7 and 2 more versions

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-76137 Stored HTML injection in Coder appearance settingsPriority LOW 21
    Show all 2 records →

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-111933
  2. 2026-10-18 Alias added: GHSA-wwfw-5crg-94f6
  3. 2026-10-18 Priority changed: MEDIUM → LOW
  4. 2026-10-19 CISA SSVC decision points changed

References

Advisory 1

  • TI-2025-29799 code-server session cookie can be extracted by having user visit specially crafted proxy URL CVSS 3.1HIGH 8.3
  • TI-2025-37344 AgentAPI exposed user chat history via a DNS rebinding attack CVSS 3.1MEDIUM 6.5
  • TI-2026-34071 Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft CVSS 3.1CRITICAL 9.1
  • TI-2026-32394 Coder vulnerable to workspace auto-creation via crafted URL parameters without user consent CVSS 3.1HIGH 8.8
  • TI-2026-27585 Code Extension Marketplace has a Zip Slip Path Traversal CVSS 4.0HIGH 8.7
  • TI-2024-18523 Coder's OIDC authentication allows email with partially matching domain to register CVSS 3.1HIGH 8.2
See all 42 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences