7.5

CVE-2026-48779: ws: Memory exhaustion DoS from tiny fragments and data chunks

Modified
AliasesUBUNTU-CVE-2026-48779DEBIAN-CVE-2026-48779CGA-2328-gv89-jx6v
Published 16-06-2026Last modified 11-09-2026

Vulnerability summary

CVE-2026-48779 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in websockets ws. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 72.9% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.43%
0%100%
Low · +0.49 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 6 · Duplicates 1 · Related 6
OPENSUSE-SU-2026:11145-1OPENSUSE-SU-2026:11452-1OPENSUSE-SU-2026:11705-1OPENSUSE-SU-2026:21173-1OPENSUSE-SU-2026:21849-1RHSA-2026:57590

Timeline

  1. 16-06-2026
    PublishedVulnerability first disclosed.
  2. 11-09-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

1.43%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

Increase +0.49 pp

From 0.93% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Ws

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard75 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
  • arangodb-3.11< 3.11.14.4-r12
  • arangodb-3.12< 3.12.9.4-r11
  • argo-workflows-ui-3.6< 3.6.19-r7
Wolfi20 products
  • code-server< 4.124.2-r0
  • jupyter-base-notebook< 7.6.3-r2
  • katib-earlystopping< 0.19.0-r31
  • katib-suggestion-goptuna-compat< 0.19.0-r40
  • katib-suggestion-hyperband< 0.19.0-r31
Opensuse5 products
  • python-bqplot&distro=openSUSE Tumbleweed< 0.13.1-15.1
  • python-ipympl&distro=openSUSE Tumbleweed< 0.10.0-18.1
  • python-jupyter-ydoc&distro=openSUSE Tumbleweed< 3.5.0-1.1
  • python-jupyterlab-templates&distro=openSUSE Tumbleweed< 0.5.3-2.1
  • python-nbclassic&distro=openSUSE Tumbleweed< 1.3.3-2.1
Debian1 product
  • node-wsAll versions (No fix recorded) | < 8.21.0+~cs14.19.1-1
Npm1 product
  • ws≥ 1.1.0, < 5.2.5 | ≥ 6.0.0, < 6.2.4 | ≥ 7.0.0, < 7.5.11 | ≥ 8.0.0, < 8.21.0
Ubuntu1 product
  • node-wsAll versions (No fix recorded)
Websockets1 product
  • ws≥ 1.1.0, < 5.2.5 | ≥ 6.0.0, < 6.2.4 | ≥ 7.0.0, < 7.5.11 | ≥ 8.0.0, < 8.21.0
Ws_project1 product
  • ws≥ 1.1.0, < 5.2.5 | ≥ 6.0.0, < 6.2.4 | ≥ 7.0.0, < 7.5.11 | ≥ 8.0.0, < 8.21.0

8 vendors · 105 products

References

41 links
Show all 41 references