CVE-2026-84890 (GCVE-0-2026-84890)

Vulnerability from cvelistv5 – Published: 2026-09-04 17:04 – Updated: 2026-09-04 18:33
VLAI
Title
undici vulnerable to Denial of Service via unbounded decompression of compressed responses
Summary
undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header. While the number of content-encoding layers is capped, the total decompressed output size is unbounded and there is no configuration option to limit it. A malicious or faulty upstream can therefore return a small compressed payload, a compression bomb, that expands to hundreds of megabytes or more in client memory, an asymmetric resource consumption that can exhaust memory and crash the process. This affects undici versions from 7.15.0 up to 7.29.1 and from 8.0.0 up to 8.10.2. Users should upgrade to undici 7.29.1 or 8.10.2.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 18:32 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
openjs CNA under the redhat root
CNA scorecard C 65/100 over 119 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
undici undici Affected: 7.15.0 , < 7.29.1 (semver)
Unaffected: 7.29.1 (semver)
Affected: 8.0.0 , < 8.10.2 (semver)
Unaffected: 8.10.2 (semver)
guessed Create a notification for this product.
Credits
mcollina UlisesGascon
Show details on NVD website
To clipboard 

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