CVE-2024-41655Public exploitNetwork attack vector

Service hang via user-controlled regular expression

Published Jul 23, 2024 · Updated Aug 2, 2024

ReDoS in tf2-item-format 4.2.6 through 5.9.13 allows remote attackers to hang services that parse crafted item names. The decomposeName function inserts user-derived toRemove text into a new RegExp and evaluates it against the user-controlled itemName, enabling catastrophic backtracking. The path requires parseString to recognize a usable item with a missing output or target, monopolizing the JavaScript event loop and hanging the hosting service.

CVSS severity7.5
High
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ReDoS in tf2-item-format 4.2.6 through 5.9.13 allows remote attackers to hang services that parse crafted item names. The decomposeName function inserts user-derived toRemove text into a new RegExp and evaluates it against the user-controlled itemName, enabling catastrophic backtracking. The path requires parseString to recognize a usable item with a missing output or target, monopolizing the JavaScript event loop and hanging the hosting service.

The record

CVE
CVE-2024-41655
Published
Jul 23, 2024
Updated
Aug 2, 2024
Vendor
danocmx
Product
tf2-item-format
Classifications
CWE-624, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 4.2.6, < 5.9.14
  2. Affected versionversion=4.2.6 <5.9.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

danocmx · tf2-item-formatversion=>= 4.2.6, < 5.9.14; version=4.2.6 <5.9.14

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-624Executable Regular Expression Error
T1499.004Application or System Exploitation

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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