CVE-2026-44029 (GCVE-0-2026-44029)
Vulnerability from cvelistv5 – Published: 2026-05-05 00:51 – Updated: 2026-05-05 12:43
VLAI
EPSS
VEX
Summary
An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-05 12:43 UTC
CWE
- CWE-36 - Absolute Path Traversal
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| NixOS | Nix |
Affected:
2.24.7 , < 2.28.7
(semver)
Affected: 2.29.0 , < 2.29.4 (semver) Affected: 2.30.0 , < 2.30.5 (semver) Affected: 2.31.0 , < 2.31.5 (semver) Affected: 2.32.0 , < 2.32.8 (semver) Affected: 2.33.0 , < 2.33.6 (semver) Affected: 2.34.0 , < 2.34.7 (semver) cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44029",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-05T12:43:20.590037Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-05T12:43:28.239Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Nix",
"vendor": "NixOS",
"versions": [
{
"lessThan": "2.28.7",
"status": "affected",
"version": "2.24.7",
"versionType": "semver"
},
{
"lessThan": "2.29.4",
"status": "affected",
"version": "2.29.0",
"versionType": "semver"
},
{
"lessThan": "2.30.5",
"status": "affected",
"version": "2.30.0",
"versionType": "semver"
},
{
"lessThan": "2.31.5",
"status": "affected",
"version": "2.31.0",
"versionType": "semver"
},
{
"lessThan": "2.32.8",
"status": "affected",
"version": "2.32.0",
"versionType": "semver"
},
{
"lessThan": "2.33.6",
"status": "affected",
"version": "2.33.0",
"versionType": "semver"
},
{
"lessThan": "2.34.7",
"status": "affected",
"version": "2.34.0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.28.7",
"versionStartIncluding": "2.24.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.29.4",
"versionStartIncluding": "2.29.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.30.5",
"versionStartIncluding": "2.30.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.31.5",
"versionStartIncluding": "2.31.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.32.8",
"versionStartIncluding": "2.32.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.33.6",
"versionStartIncluding": "2.33.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.34.7",
"versionStartIncluding": "2.34.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via \"nix-prefetch-url --unpack\" or \"nix store prefetch-file --unpack\" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);"
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-36",
"description": "CWE-36 Absolute Path Traversal",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-05T00:58:14.984Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407"
},
{
"url": "https://www.openwall.com/lists/oss-security/2026/05/04/33"
},
{
"url": "https://github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p"
}
],
"x_generator": {
"engine": "CVE-Request-form 0.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2026-44029",
"datePublished": "2026-05-05T00:51:05.533Z",
"dateReserved": "2026-05-05T00:51:05.139Z",
"dateUpdated": "2026-05-05T12:43:28.239Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-44029",
"date": "2026-09-17",
"epss": "0.00573",
"percentile": "0.45884"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Nix",
"vendor": "NixOS",
"versions": [
{
"lessThan": "2.28.7",
"status": "affected",
"version": "2.24.7",
"versionType": "semver"
},
{
"lessThan": "2.29.4",
"status": "affected",
"version": "2.29.0",
"versionType": "semver"
},
{
"lessThan": "2.30.5",
"status": "affected",
"version": "2.30.0",
"versionType": "semver"
},
{
"lessThan": "2.31.5",
"status": "affected",
"version": "2.31.0",
"versionType": "semver"
},
{
"lessThan": "2.32.8",
"status": "affected",
"version": "2.32.0",
"versionType": "semver"
},
{
"lessThan": "2.33.6",
"status": "affected",
"version": "2.33.0",
"versionType": "semver"
},
{
"lessThan": "2.34.7",
"status": "affected",
"version": "2.34.0",
"versionType": "semver"
}
]
}
],
"source": "cve@mitre.org"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via \"nix-prefetch-url --unpack\" or \"nix store prefetch-file --unpack\" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);"
}
],
"id": "CVE-2026-44029",
"lastModified": "2026-06-17T10:50:12.980",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "cve@mitre.org",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-44029",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-05T12:43:20.590037Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-05-05T01:16:07.170",
"references": [
{
"source": "cve@mitre.org",
"url": "https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407"
},
{
"source": "cve@mitre.org",
"url": "https://github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p"
},
{
"source": "cve@mitre.org",
"url": "https://www.openwall.com/lists/oss-security/2026/05/04/33"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-36"
}
],
"source": "cve@mitre.org",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-07-15T14:29:51+00:00",
"cve": "CVE-2026-44029",
"id": "CVE-2026-44029",
"initial_release_date": "2026-05-05T00:51:05.533000+00:00",
"product_status:fixed": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "nix: absolute path traversal when unpacking archives to disk",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44029.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-05-06T01:40:18Z",
"cve": "CVE-2026-44029",
"id": "CVE-2026-44029",
"initial_release_date": "2026-05-06T01:40:18Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-44029",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-44029.json",
"version": "2"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44029",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-05T12:43:20.590037Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-05T12:43:23.712Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Nix",
"vendor": "NixOS",
"versions": [
{
"lessThan": "2.28.7",
"status": "affected",
"version": "2.24.7",
"versionType": "semver"
},
{
"lessThan": "2.29.4",
"status": "affected",
"version": "2.29.0",
"versionType": "semver"
},
{
"lessThan": "2.30.5",
"status": "affected",
"version": "2.30.0",
"versionType": "semver"
},
{
"lessThan": "2.31.5",
"status": "affected",
"version": "2.31.0",
"versionType": "semver"
},
{
"lessThan": "2.32.8",
"status": "affected",
"version": "2.32.0",
"versionType": "semver"
},
{
"lessThan": "2.33.6",
"status": "affected",
"version": "2.33.0",
"versionType": "semver"
},
{
"lessThan": "2.34.7",
"status": "affected",
"version": "2.34.0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.28.7",
"versionStartIncluding": "2.24.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.29.4",
"versionStartIncluding": "2.29.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.30.5",
"versionStartIncluding": "2.30.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.31.5",
"versionStartIncluding": "2.31.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.32.8",
"versionStartIncluding": "2.32.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.33.6",
"versionStartIncluding": "2.33.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.34.7",
"versionStartIncluding": "2.34.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via \"nix-prefetch-url --unpack\" or \"nix store prefetch-file --unpack\" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);"
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-36",
"description": "CWE-36 Absolute Path Traversal",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-05T00:58:14.984Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407"
},
{
"url": "https://www.openwall.com/lists/oss-security/2026/05/04/33"
},
{
"url": "https://github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p"
}
],
"x_generator": {
"engine": "CVE-Request-form 0.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2026-44029",
"datePublished": "2026-05-05T00:51:05.533Z",
"dateReserved": "2026-05-05T00:51:05.139Z",
"dateUpdated": "2026-05-05T12:43:28.239Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…