juliangruber brace-expansion up to 5.0.5 resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in juliangruber brace-expansion up to 5.0.5. It has been declared as problematic. This affects an unknown part. The manipulation results in resource consumption. This vulnerability is known as CVE-2026-45149. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in juliangruber brace-expansion up to 5.0.5. Affected is some unknown processing. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

The brace-expansion library generates arbitrary strings containing a common prefix and suffix. From 5.0.0 to before 5.0.6, the max option was being applied too late. When expanding a single large numeric range like {1..10000000}, the sequence generation loop generates all 10 million intermediate elements before the max limit is applied With max=10, the output is correctly limited to 10 items, but the process still allocates ~505 MB and spends ~800ms building the full intermediate array. This vulnerability is fixed in 5.0.6.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-45149 since 05/08/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 5.0.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-33442) and CERT Bund (WID-SEC-2026-2118). Once again VulDB remains the best source for vulnerability data.

Affected

  • IBM App Connect Enterprise

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: brace-expansion 5.0.6

Timelineinfo

05/08/2026 CVE reserved
05/30/2026 +22 days Advisory disclosed
05/30/2026 +0 days VulDB entry created
06/29/2026 +30 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-jxxr-4gwj-5jf2
Status: Confirmed

CVE: CVE-2026-45149 (🔒)
GCVE (CVE): GCVE-0-2026-45149
GCVE (VulDB): GCVE-100-367380
EUVD: 🔒
CERT Bund: WID-SEC-2026-2118 - IBM App Connect Enterprise: Mehrere Schwachstellen

Entryinfo

Created: 05/30/2026 07:30
Updated: 06/29/2026 14:05
Changes: 05/30/2026 07:30 (64), 05/30/2026 08:28 (1), 06/07/2026 12:52 (11), 06/29/2026 14:05 (7)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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