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CVE Vulnerability Details :
CVE-2026-55078
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-07 Jul, 2026 | 22:47
Updated At-08 Jul, 2026 | 13:55
Rejected At-
▼CVE Numbering Authority (CNA)
Coder: Zip upload decompression lacks aggregate size limit, enabling denial of service

Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.17.0 and prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `POST /api/v2/files` converts zip uploads to tar in memory via `CreateTarFromZip`, which enforced a per-entry size limit but no aggregate limit on total decompressed output, writing to an unbounded in-memory buffer. Exploitation requires authenticated file-upload access and the impact is limited to availability (denial of service). The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 adds a metadata preflight check that sums projected entry sizes and a streaming writer that enforces the aggregate limit during decompression. As a workaround, restrict file-upload permissions to trusted users or place a reverse proxy with request-body size limits in front of `coderd`.

Affected Products
Vendor
coder
Product
coder
Versions
Affected
  • >= 2.34.0, < 2.34.2
  • >= 2.33.0, < 2.33.8
  • >= 2.30.0, < 2.32.7
  • >= 2.17.0, < 2.29.17
Problem Types
TypeCWE IDDescription
CWECWE-409CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
CWECWE-770CWE-770: Allocation of Resources Without Limits or Throttling
Type: CWE
CWE ID: CWE-409
Description: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Type: CWE
CWE ID: CWE-770
Description: CWE-770: Allocation of Resources Without Limits or Throttling
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/coder/coder/security/advisories/GHSA-2mg2-p7r7-g27f
x_refsource_CONFIRM
https://github.com/coder/coder/pull/25877
x_refsource_MISC
https://github.com/coder/coder/releases/tag/v2.29.17
x_refsource_MISC
https://github.com/coder/coder/releases/tag/v2.32.7
x_refsource_MISC
https://github.com/coder/coder/releases/tag/v2.33.8
x_refsource_MISC
https://github.com/coder/coder/releases/tag/v2.34.2
x_refsource_MISC
Hyperlink: https://github.com/coder/coder/security/advisories/GHSA-2mg2-p7r7-g27f
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/coder/coder/pull/25877
Resource:
x_refsource_MISC
Hyperlink: https://github.com/coder/coder/releases/tag/v2.29.17
Resource:
x_refsource_MISC
Hyperlink: https://github.com/coder/coder/releases/tag/v2.32.7
Resource:
x_refsource_MISC
Hyperlink: https://github.com/coder/coder/releases/tag/v2.33.8
Resource:
x_refsource_MISC
Hyperlink: https://github.com/coder/coder/releases/tag/v2.34.2
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Details not found