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CVE-2026-44215

📛 CVE Title

NanaZip: Heap out-of-bounds write in NanaZip UFS directory parser

⬇ Download JSON ⚠ View as Threat

Description

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0.

Overview

State
PUBLISHED
Assigner (CNA)
GitHub_M
CVSS severity
MEDIUM
CVSS score
CVSS 4.4 / 10 4.4 4.4 / 10
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Effective score
4.4 / 10 MEDIUM source: CNA overview
CWE(s)
CWE-787
Reserved
2026-05-05
Published
2026-05-12 21:23 UTC
Last updated
2026-05-13 17:37 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/44xxx/CVE-2026-44215.json
Linked Threat
CVE-2026-44215 — CVE-2026-44215

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-12 20:16:42 UTC
NVD last modified
2026-05-14 15:48:22 UTC
NVD CVSS v3.1
CVSS 4.4 / 10 4.4 4.4 / 10 MEDIUM source: security-advisories@github.com
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Exploitability subscore
1.8 / 10
Impact subscore
2.5 / 10
EPSS score
0.0003 (probability of exploitation in next 30 days)
EPSS percentile
8.11% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 08:43 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-29793
Assigner
GitHub_M
Published
May 12, 2026, 7:23:43 PM
Updated
May 13, 2026, 3:37:40 PM
EUVD base score (CVSS 3.1)
4.4 / 10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
EUVD-reported EPSS
0.0300
Vendors
M2Team
Products
NanaZip (5.0.1250.0, < 6.0.1698.0)

ENISA description: NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0.

EUVD references (1)

Affected products (1)
VendorProductVersionsPlatforms
M2Team NanaZip >= 5.0.1250.0, < 6.0.1698.0 (affected) —

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-44215.json.

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44215",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-13T14:57:57.146196Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "providerMetadata": {
          "dateUpdated": "2026-05-13T15:37:40.830Z",
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        "references": [
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            "url": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-44wh-7gc3-w936"
          }
        ],
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
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          "vendor": "M2Team",
          "versions": [
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            }
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L",
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      "problemTypes": [
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      "providerMetadata": {
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      },
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          "name": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-44wh-7gc3-w936",
          "tags": [
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          ],
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      ],
      "source": {
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        "discovery": "UNKNOWN"
      },
      "title": "NanaZip: Heap out-of-bounds write in NanaZip UFS directory parser"
    }
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  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "datePublished": "2026-05-12T19:23:43.798Z",
    "dateReserved": "2026-05-05T15:13:47.572Z",
    "dateUpdated": "2026-05-13T15:37:40.830Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}