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CVE-2024-27983

Concurrent Execution using Shared Resource with Improper Synchronization

CVSS 3.0 High 8.2

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Description

An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside. It is possible to leave some data in nghttp2 memory after reset when headers with HTTP/2 CONTINUATION frame are sent to the server and then a TCP connection is abruptly closed by the client triggering the Http2Session destructor while header frames are still being processed (and stored in memory) causing a race condition.

Official description from the CVE record, published by hackerone. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.0 High 8.2

Score published by hackerone in the CVE record.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

  • Attack vector: Network

    The vulnerable component can be reached over a network, possibly from the Internet.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: None

    No account or privileges are needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: None

    No effect on the secrecy of data.

  • Integrity impact: Low

    Limited effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.84384 (84.4% probability)
Percentile
99.7%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA assessment as of Apr 9, 2024

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Automatable
yes
Technical impact
partial

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.
  • CWE-362Concurrent Execution using Shared Resource with Improper Synchronization

Affected products

Products listed in the CVE record, as the CNA published them.

  • NodeJS Node

    • affected: 4.0 up to before 4.*
    • affected: 5.0 up to before 5.*
    • affected: 6.0 up to before 6.*
    • affected: 7.0 up to before 7.*
    • affected: 8.0 up to before 8.*
    • affected: 9.0 up to before 9.*
    • affected: 10.0 up to before 10.*
    • affected: 11.0 up to before 11.*
    • affected: 12.0 up to before 12.*
    • affected: 13.0 up to before 13.*
    • affected: 14.0 up to before 14.*
    • affected: 15.0 up to before 15.*
    • affected: 16.0 up to before 16.*
    • affected: 17.0 up to before 17.*
    • affected: 18.0 up to before 18.20.1
    • affected: 19.0 up to before 19.*
    • affected: 20.0 up to before 20.12.1
    • affected: 21.0 up to before 21.7.2

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Record last updated

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:52 UTC. Sources and licenses