CVE-2026-48779 (GCVE-0-2026-48779)

Vulnerability from cvelistv5 – Published: 2026-06-16 21:26 – Updated: 2026-07-10 12:05
VLAI
Title
ws: Memory exhaustion DoS from tiny fragments and data chunks
Summary
ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-770 - Allocation of Resources Without Limits or Throttling
  • CWE-1050 - Excessive Platform Resource Consumption within a Loop
Assigner
References
URL Tags
https://github.com/websockets/ws/security/advisor… x_refsource_CONFIRM
https://github.com/websockets/ws/commit/86d3e8a5f… x_refsource_MISC
https://github.com/websockets/ws/commit/b5372ac67… x_refsource_MISC
https://github.com/websockets/ws/commit/bca91adf1… x_refsource_MISC
https://github.com/websockets/ws/commit/fd36cd864… x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2026-48779 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2489661 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:34342 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36754 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33574 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29197 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36820 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33155 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33163 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33173 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33183 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33160 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37272 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
websockets ws Affected: >= 1.1.0, < 5.2.5
Affected: >= 6.0.0, < 6.2.4
Affected: >= 7.0.0, < 7.5.11
Affected: >= 8.0.0, < 8.21.0
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Red Hat Cluster Observability Operator 1.5.0     cpe:/a:redhat:cluster_observability_operator:1.5::el9
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}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.