CVE-2024-33260Public exploit

Engine crash via near-null parser write

Published Apr 26, 2024 · Updated Aug 2, 2024

Memory corruption in JerryScript commit cefd391 allows local users to crash the engine by parsing a crafted JavaScript class expression. The parser_parse_class routine in jerry-core/parser/js/js-parser-expr.c performs a write through a near-null address while handling the crafted class expression. Execution requires the affected engine to parse attacker-controlled JavaScript, and the demonstrated consequence is termination of that engine process.

CVSS severity5.1
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in JerryScript commit cefd391 allows local users to crash the engine by parsing a crafted JavaScript class expression. The parser_parse_class routine in jerry-core/parser/js/js-parser-expr.c performs a write through a near-null address while handling the crafted class expression. Execution requires the affected engine to parse attacker-controlled JavaScript, and the demonstrated consequence is termination of that engine process.

The record

CVE
CVE-2024-33260
Published
Apr 26, 2024
Updated
Aug 2, 2024
Vendor
JerryScript Project
Product
JerryScript
Classifications
CWE-284, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

JerryScript Project · JerryScriptversion=-

Published CVSS scores

5.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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