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Vulnerability Details :

CVE-2026-42444

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-12 May, 2026 | 19:22
Updated At-14 May, 2026 | 19:17
Rejected At-
Credits

NanaZip: Unbounded resource consumption in NanaZip littlefs parser via attacker-controlled BlockCount

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a denial-of-service vulnerability exists in the littlefs filesystem image parser in NanaZip. The handler's Open method reads BlockCount directly from the attacker-controlled superblock without any validation against the actual file size or any upper-bound ceiling, then iterates BlockCount times, allocating a file-path entry per iteration. A crafted 44-byte littlefs image with BlockCount = 0xFFFFFFFF causes ~4 billion heap allocations, exhausting available memory. This vulnerability is fixed in 6.0.1698.0.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:12 May, 2026 | 19:22
Updated At:14 May, 2026 | 19:17
Rejected At:
â–¼CVE Numbering Authority (CNA)
NanaZip: Unbounded resource consumption in NanaZip littlefs parser via attacker-controlled BlockCount

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a denial-of-service vulnerability exists in the littlefs filesystem image parser in NanaZip. The handler's Open method reads BlockCount directly from the attacker-controlled superblock without any validation against the actual file size or any upper-bound ceiling, then iterates BlockCount times, allocating a file-path entry per iteration. A crafted 44-byte littlefs image with BlockCount = 0xFFFFFFFF causes ~4 billion heap allocations, exhausting available memory. This vulnerability is fixed in 6.0.1698.0.

Affected Products
Vendor
M2Team
Product
NanaZip
Versions
Affected
  • >= 5.0.1250.0, < 6.0.1698.0
Problem Types
TypeCWE IDDescription
CWECWE-770CWE-770: Allocation of Resources Without Limits or Throttling
Type: CWE
CWE ID: CWE-770
Description: CWE-770: Allocation of Resources Without Limits or Throttling
Metrics
VersionBase scoreBase severityVector
3.13.3LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Version: 3.1
Base score: 3.3
Base severity: LOW
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq
x_refsource_CONFIRM
Hyperlink: https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq
Resource:
x_refsource_CONFIRM
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq
exploit
Hyperlink: https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq
Resource:
exploit
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:12 May, 2026 | 20:16
Updated At:18 May, 2026 | 14:17

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a denial-of-service vulnerability exists in the littlefs filesystem image parser in NanaZip. The handler's Open method reads BlockCount directly from the attacker-controlled superblock without any validation against the actual file size or any upper-bound ceiling, then iterates BlockCount times, allocating a file-path entry per iteration. A crafted 44-byte littlefs image with BlockCount = 0xFFFFFFFF causes ~4 billion heap allocations, exhausting available memory. This vulnerability is fixed in 6.0.1698.0.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.13.3LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Primary3.15.5MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 3.3
Base severity: LOW
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Type: Primary
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CPE Matches

m2team
m2team
>>nanazip>>Versions from 5.0.1252.0(inclusive) to 6.0.1698.0(exclusive)
cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-770Secondarysecurity-advisories@github.com
CWE ID: CWE-770
Type: Secondary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmqsecurity-advisories@github.com
Mitigation
Vendor Advisory
https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq134c704f-9b21-4f2e-91b3-4a467353bcc0
Mitigation
Vendor Advisory
Hyperlink: https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq
Source: security-advisories@github.com
Resource:
Mitigation
Vendor Advisory
Hyperlink: https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Mitigation
Vendor Advisory

Change History

0
Information is not available yet

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CWE ID-CWE-770
Allocation of Resources Without Limits or Throttling
CVE-2023-30406
Matching Score-4
Assigner-MITRE Corporation
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Action-Not Available
Vendor-jerryscriptn/a
Product-jerryscriptn/a
CWE ID-CWE-770
Allocation of Resources Without Limits or Throttling
CWE ID-CWE-400
Uncontrolled Resource Consumption
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