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TI-2026-40002 Aliases CVE-2026-55434GHSA-f5vp-w269-392g

Coder vulnerable to denial of service via unbounded request body in AI Bridge provider endpoints

Priority LOW 30CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.33.0 and prior to versions 2.33.8 and 2.34.2, AI Bridge provider handlers read request bodies with `io.ReadAll` without a maximum size so an authenticated user with AI Bridge access could send an arbitrarily large body and exhaust memory. Exploitation requires authenticated access to the AI Bridge endpoints and the impact is limited to availability (denial of service). Versions 2.33.8 and 2.34.2 patch the issue. No known workarounds are available.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00552 46th percentileScored 2026-11-07
Fix Fixed coder (coder): 2.34.2, 2.33.8github.com/coder/coder/v2 (Go): 2.34.2, 2.33.8

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

VendorProductAffected versionsFixed inStatusSource
codercoder2.34.0 to before 2.34.2; 2.33.0 to before 2.33.82.34.2, 2.33.8Patch availableCNA
—github.com/coder/coder/v2 (Go)2.34.0 to before 2.34.22.34.2Patch availableGHSA-f5vp-w269-392g
—github.com/coder/coder/v2 (Go)2.33.0 to before 2.33.82.33.8Patch availableGHSA-f5vp-w269-392g
  • coder Vendorcoder Affected 2.34.0 to before 2.34.2; 2.33.0 to before 2.33.8 Fixed in 2.34.2, 2.33.8 Patch available CNA
  • github.com/coder/coder/v2 (Go) Vendor— Affected 2.34.0 to before 2.34.2 Fixed in 2.34.2 Patch available GHSA-f5vp-w269-392g
  • github.com/coder/coder/v2 (Go) Vendor— Affected 2.33.0 to before 2.33.8 Fixed in 2.33.8 Patch available GHSA-f5vp-w269-392g

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*2.33.0 to before 2.33.8; 2.34.0 to before 2.34.2Vulnerablecoder
  • cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:* Versions 2.33.0 to before 2.33.8; 2.34.0 to before 2.34.2 Vulnerable ·coder

Remediation

  • Fix · CNA coder (coder) Fixed in 2.34.2, 2.33.8
  • Fix · GHSA-f5vp-w269-392g github.com/coder/coder/v2 (Go) Fixed in 2.34.2 Advisory →
  • Fix · GHSA-f5vp-w269-392g github.com/coder/coder/v2 (Go) Fixed in 2.33.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55434
  2. 2026-10-03 Alias added: GHSA-f5vp-w269-392g

References

Patch 2

Advisory 1

Other 3

  • 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-2024-18523 Coder's OIDC authentication allows email with partially matching domain to register CVSS 3.1HIGH 8.2
  • TI-2026-39997 Coder's workspace app upsert allows cross-workspace agent rebinding via user-controlled app ID CVSS 3.1HIGH 8.7
  • TI-2026-39996 Coder: Route hijacking through lack of validation of agent-supplied AllowedIPs in tailnet coordinator CVSS 3.1HIGH 8.2
  • TI-2026-39995 Coder vulnerable to SSH config injection via unsanitized server-supplied values in `coder config-ssh` CVSS 3.1HIGH 8.3
See all 22 →

Sources

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