Resource exhaustion in Coder
CVE-2026-55434
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Coder — versions >= 2.34.0, < 2.34.2, >= 2.33.0, < 2.33.8
Weakness classification (CWE)
References
- github.com/coder/coder/security/advisories/GHSA-f5vp-w269-392g (Patch, Vendor Advisory)
- github.com/coder/coder/pull/26164 (Patch, Issue Tracking)
- github.com/coder/coder/releases/tag/v2.33.8 (Release Notes)
- github.com/coder/coder/releases/tag/v2.34.2 (Release Notes)
Frequently asked questions
- What is CVE-2026-55434?
- CVE-2026-55434 is a medium-severity vulnerability in Coder, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-07-07.
- How severe is CVE-2026-55434?
- Medium severity. CVSS v3 base score is 6.5 out of 10.