TI-2026-76133 Aliases CVE-2026-111928 GHSA-4q6w-qppm-gxr9

Authorization bypass in Coder RBAC policy via user-level ACL

LOW 23CWE-863Published 2026-10-17 · Updated 2026-10-19

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

Coder from 2.0.0 before 2.34.8 contains an incorrect authorization flaw in the acl_allow rule of its RBAC policy, which does not verify organization membership for per-user ACL entries. Removing a user from an organization does not scrub those entries, so an authenticated user can keep reaching previously granted organization-scoped resources such as templates and workspaces through the API. The flaw is tracked as CWE-863. An authenticated user with low privileges on the network can exploit it with no user interaction.

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

Description from the CNA

Coder from 2.0.0 before 2.34.8 contains an incorrect authorization vulnerability in the acl_allow rule of coderd/rbac/policy.rego, which does not verify organization membership for per-user ACL entries, and organization member removal does not scrub those entries. Authenticated users removed from an organization can keep accessing previously granted org-scoped resources such as templates and workspaces via the API.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00143 3rd percentileScored 2026-11-07

Fix Fixed coder (coder): 2.34.8

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

Vendor	Product	Affected versions	Fixed in	Status	Source
coder	coder	2.0.0 to before 2.34.8	2.34.8	Patch available	CNA

coder Vendorcoder Affected 2.0.0 to before 2.34.8 Fixed in 2.34.8 Patch available CNA

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
cpe:2.3:a:coder:coder::::::::	—	—	coder

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

Remediation

Upgrade coder to version 2.34.8 or later.

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

Fix · CNA coder (coder) Fixed in 2.34.8

Fixed in the same release

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

Release · 2026-10-17
coder 2.34.8
6 records Highest priority Priority LOW 6 LOW
Other records, highest priority first
- TI-2026-76132 Hostname prefix match in Coder workspace proxy leaks API keysPriority LOW 39
- TI-2026-76134 Coder bypass exposes other organizations' Terraform module filesPriority LOW 26
- TI-2026-76136 Open redirect in Coder via workspace app proxyPriority LOW 23
Show all 6 records →

Timeline

2026-10-18 Threatist record created from CVE-2026-111928
2026-10-18 Alias added: GHSA-4q6w-qppm-gxr9
2026-10-19 CISA SSVC decision points changed

References

Advisory 1

GitHub Security Advisory (GHSA-7v78-w67v-pm2g)

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