CVE-2026-55432Coder's sub-agent app registration bypasses template port-sharing policy enforcement
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, the `CreateSubAgent` RPC did not validate a requested app sharing level against the template's `MaxPortSharingLevel` before persisting workspace apps, letting a workspace owner exceed the administrator's configured maximum. Exploitation requires the ability to register sub-agent apps in a workspace the attacker controls. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2clamps the sub-agent app sharing level to the template's `MaxPortSharingLevel`. As a workaround, disable wildcard app hostnames (`CODER_WILDCARD_ACCESS_URL`) to block subdomain-based app routing.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Jul 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
coder coder coder:coder (from the name) | from 2.34.0, < 2.34.2; from 2.33.0, < 2.33.8; from 2.30.0, < 2.32.7; before 2.29.17 | CNA record |
coder coder coder:coder | before 2.29.17; from 2.30.0 before 2.32.7; from 2.33.0 before 2.33.8; from 2.34.0 before 2.34.2 | NVD |
References
- https://github.com/coder/coder/security/advisories/GHSA-x9qq-2qh5-8rxfx-refsource-confirm, patch, vendor-advisory
- https://github.com/coder/coder/pull/26061x-refsource-misc, issue-tracking, patch
- https://github.com/coder/coder/releases/tag/v2.29.17x-refsource-misc, release-notes
- https://github.com/coder/coder/releases/tag/v2.32.7x-refsource-misc, release-notes
- https://github.com/coder/coder/releases/tag/v2.33.8x-refsource-misc, release-notes
- https://github.com/coder/coder/releases/tag/v2.34.2x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.