CVE-2026-24001Network attack vector

Process crash via malformed patch headers

Published Jan 22, 2026 · Updated Jan 22, 2026

Denial of service in affected kpdecker jsdiff releases before 8.0.3 allows attackers to crash applications through crafted patch input. parsePatch applies filename-header parsing that fails on carriage returns or Unicode line separators, causing an infinite loop and unbounded memory use; leading-garbage matching can also take cubic time. Reachability requires an application to parse attacker-controlled patch text or attacker-controlled filenames, and applyPatch is affected only when given a patch string.

CVSS severity7.5
High
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected kpdecker jsdiff releases before 8.0.3 allows attackers to crash applications through crafted patch input. parsePatch applies filename-header parsing that fails on carriage returns or Unicode line separators, causing an infinite loop and unbounded memory use; leading-garbage matching can also take cubic time. Reachability requires an application to parse attacker-controlled patch text or attacker-controlled filenames, and applyPatch is affected only when given a patch string.

The record

CVE
CVE-2026-24001
Published
Jan 22, 2026
Updated
Jan 22, 2026
Vendor
kpdecker
Product
jsdiff
Classifications
CWE-400, CWE-1333, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 2026Record 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=< 4.0.4
  2. Affected versionversion=>= 5.0.0, < 5.2.2
  3. Affected versionversion=>= 6.0.0, < 8.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

kpdecker · jsdiffversion=< 4.0.4; version=>= 5.0.0, < 5.2.2; version=>= 6.0.0, < 8.0.3

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-1333Inefficient Regular Expression Complexity
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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