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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/coder/coder/pull/26164	Issue Tracking Patch
https://github.com/coder/coder/releases/tag/v2.33.8	Release Notes
https://github.com/coder/coder/releases/tag/v2.34.2	Release Notes
https://github.com/coder/coder/security/advisories/GHSA-f5vp-w269-392g	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*

History

No history.

Information

Published : 2026-07-07 21:17

Updated : 2026-07-08 19:47

NVD link : CVE-2026-55434

Mitre link : CVE-2026-55434

CVE.ORG link : CVE-2026-55434

JSON object : View

Products Affected

coder

coder

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

{"id": "CVE-2026-55434", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55434", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-08T14:15:03.906169Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "coder", "product": "coder", "versions": [{"status": "affected", "version": ">= 2.34.0, < 2.34.2"}, {"status": "affected", "version": ">= 2.33.0, < 2.33.8"}]}]}], "published": "2026-07-07T21:17:27.290", "references": [{"url": "https://github.com/coder/coder/pull/26164", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.33.8", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.34.2", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/security/advisories/GHSA-f5vp-w269-392g", "tags": ["Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-07-08T19:47:17.140", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "F759EEF3-6EAE-475B-85F8-38E7D7B47438", "versionEndExcluding": "2.33.8", "versionStartIncluding": "2.33.0"}, {"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "397A02BF-6CF6-40B1-B792-D7CB9D229050", "versionEndExcluding": "2.34.2", "versionStartIncluding": "2.34.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}