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CVE-2026-42444

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 h
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8f8f68a01b9a267d8bdf46618fc984aa7e66b600d83b491926c18e3d2c3577ea
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"NanaZip","vendor":"M2Team","versions":[{"status":"affected","version":">= 5.0.1250.0, < 6.0.1698.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4fabfa97b030f8a15d1cbbdc354d374b6686060895912592cd06beed6b62435a · sha256:60cd2699242a7a9d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":3.3,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4fabfa97b030f8a15d1cbbdc354d374b6686060895912592cd06beed6b62435a · sha256:60cd2699242a7a9d… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4fabfa97b030f8a15d1cbbdc354d374b6686060895912592cd06beed6b62435a · sha256:60cd2699242a7a9d… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4fabfa97b030f8a15d1cbbdc354d374b6686060895912592cd06beed6b62435a · sha256:60cd2699242a7a9d… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4fabfa97b030f8a15d1cbbdc354d374b6686060895912592cd06beed6b62435a · sha256:60cd2699242a7a9d… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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