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TI-2026-58354 Aliases CVE-2026-84890GHSA-3xpg-4rpp-hhhm

undici vulnerable to Denial of Service via unbounded decompression of compressed responses

Priority LOW 27CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 17 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00412 35th percentileScored 2026-11-07
Fix Partial undici (undici): 7.29.1, 8.10.2undici (npm): 7.29.1, 8.10.2Red Hat: 3 advisoriesRed Hat: 1 fixed, 17 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NodeJSundici7.15.0 to before 7.29.1; 8.0.0 to before 8.10.27.29.1, 8.10.2Patch availableCNA
—undici (npm)7.15.0 to before 7.29.17.29.1Patch availableGHSA-3xpg-4rpp-hhhm
—undici (npm)8.0.0 to before 8.10.28.10.2Patch availableGHSA-3xpg-4rpp-hhhm
  • undici VendorNodeJS Affected 7.15.0 to before 7.29.1; 8.0.0 to before 8.10.2 Fixed in 7.29.1, 8.10.2 Patch available CNA
  • undici (npm) Vendor— Affected 7.15.0 to before 7.29.1 Fixed in 7.29.1 Patch available GHSA-3xpg-4rpp-hhhm
  • undici (npm) Vendor— Affected 8.0.0 to before 8.10.2 Fixed in 8.10.2 Patch available GHSA-3xpg-4rpp-hhhm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*7.15.0 to before 7.29.1; 8.0.0 to before 8.10.2VulnerableNodeJS
  • cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:* Versions 7.15.0 to before 7.29.1; 8.0.0 to before 8.10.2 Vulnerable ·NodeJS

Remediation

  • Fix · CNA undici (undici) Fixed in 7.29.1, 8.10.2
  • Fix · GHSA-3xpg-4rpp-hhhm undici (npm) Fixed in 7.29.1 Advisory →
  • Fix · GHSA-3xpg-4rpp-hhhm undici (npm) Fixed in 8.10.2 Advisory →

Red Hat 3 advisories

  • RHSA-2026:66008 Released 2026-09-09 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana12.4-12.4.10-0.2.hum1@aarch64, grafana12.4-12.4.10-0.2.hum1@src, grafana12.4-12.4.10-0.2.hum1@x86_64
  • RHSA-2026:54438 Released 2026-08-12 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs24-1:24.18.1-0.2.2.hum1@aarch64, nodejs24-1:24.18.1-0.2.2.hum1@src, nodejs24-1:24.18.1-0.2.2.hum1@x86_64 +14
  • RHSA-2026:54389 Released 2026-08-12 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images nodejs26-1:26.7.0-1.5.2.hum1@aarch64, nodejs26-1:26.7.0-1.5.2.hum1@src, nodejs26-1:26.7.0-1.5.2.hum1@x86_64 +16

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    undici 7.29.1, 8.10.2

    7 records Highest priority Priority MEDIUM 1 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2026-58384 undici vulnerable to TLS certificate validation bypass via dropped connect options in BalancedPoolPriority MEDIUM 40
    • TI-2026-58374 undici vulnerable to cross-user cookie disclosure via Set-Cookie caching in shared cachesPriority LOW 35
    • TI-2026-58409 undici vulnerable to Denial of Service via WebSocketStream unclean closePriority LOW 33
    Show all 7 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix planned: Out of support scope
OpenShift PipelinesAffectedNo fix yet: Fix deferred
Red Hat AMQ Broker 7AffectedNo fix yet: Fix deferred
Red Hat Ansible Automation Platform 2AffectedNo fix yet: Fix deferred
Red Hat Build of Podman DesktopAffectedNo fix yet: Fix deferred
Red Hat Developer Hub 1AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesAffectedNo fix planned: Will not fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Dev SpacesAffectedNo fix yet: Fix deferred
Red Hat Openshift Data Foundation 4AffectedNo fix yet: Fix deferred
Red Hat Trusted Artifact SignerAffectedNo fix planned: Out of support scope
Secrets Management Console for Red Hat OpenShiftAffectedNo fix planned: Out of support scope
Self-service automation portal 2AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:54389, RHSA-2026:54438, RHSA-2026:66008
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-84890
  2. 2026-10-03 Alias added: GHSA-3xpg-4rpp-hhhm
  3. 2026-10-27 Affected versions changed · Red Hat

References

Advisory 3

Other 5

  • TI-2026-01215 undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') CVSS 3.1CRITICAL 9.8
  • TI-2022-16376 `undici.request` vulnerable to SSRF using absolute URL on `pathname` CVSS 3.1CRITICAL 9.8
  • TI-2023-09734 CRLF Injection in Nodejs ‘undici’ via host CVSS 3.1MEDIUM 6.5
  • TI-2022-13193 CRLF injection in request headers CVSS 3.1MEDIUM 6.5
  • TI-2022-16375 CRLF Injection in Nodejs ‘undici’ via Content-Type CVSS 3.1MEDIUM 5.3
  • TI-2022-13194 Uncleared cookies on cross-host/cross-origin redirect in undici CVSS 3.1MEDIUM 6.5
See all 51 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences