CVE-2026-59874 - Vulnerability Details - OpenCVE

node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, tar.replace accepts a checksum-valid tar header with a negative base-256 encoded entry size, causing the archive scanner to make no progress while repeatedly parsing the same header. This issue is fixed in version 7.5.18.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact partial

No data.

No data.

No data.

No data.

References

Link	Providers
https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5
https://github.com/isaacs/node-tar/releases/tag/v7.5.18
https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w

History

Wed, 08 Jul 2026 17:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 08 Jul 2026 15:45:00 +0000

Type	Values Removed	Values Added
Description		node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, tar.replace accepts a checksum-valid tar header with a negative base-256 encoded entry size, causing the archive scanner to make no progress while repeatedly parsing the same header. This issue is fixed in version 7.5.18.
Title		node-tar: Negative tar entry size causes infinite loop in archive replace
Weaknesses		CWE-835
References		https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5 https://github.com/isaacs/node-tar/releases/tag/v7.5.18 https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w
Metrics		cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-07-08T15:23:47.527Z

Updated: 2026-07-08T17:00:42.937Z

Reserved: 2026-07-07T15:41:53.607Z

Link: CVE-2026-59874

Vulnrichment

Updated: 2026-07-08T16:51:16.720Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-59874", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-07T15:41:53.607Z", "datePublished": "2026-07-08T15:23:47.527Z", "dateUpdated": "2026-07-08T17:00:42.937Z"}, "containers": {"cna": {"title": "node-tar: Negative tar entry size causes infinite loop in archive replace", "problemTypes": [{"descriptions": [{"cweId": "CWE-835", "lang": "en", "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w"}, {"name": "https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5", "tags": ["x_refsource_MISC"], "url": "https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5"}, {"name": "https://github.com/isaacs/node-tar/releases/tag/v7.5.18", "tags": ["x_refsource_MISC"], "url": "https://github.com/isaacs/node-tar/releases/tag/v7.5.18"}], "affected": [{"vendor": "isaacs", "product": "node-tar", "versions": [{"version": "< 7.5.18", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-08T15:23:47.527Z"}, "descriptions": [{"lang": "en", "value": "node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, tar.replace accepts a checksum-valid tar header with a negative base-256 encoded entry size, causing the archive scanner to make no progress while repeatedly parsing the same header. This issue is fixed in version 7.5.18."}], "source": {"advisory": "GHSA-8x88-c5mf-7j5w", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-08T16:51:08.126808Z", "id": "CVE-2026-59874", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-08T17:00:42.937Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-59874", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-08T16:51:08.126808Z"}}}], "references": [{"url": "https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-08T16:51:16.720Z"}}], "cna": {"title": "node-tar: Negative tar entry size causes infinite loop in archive replace", "source": {"advisory": "GHSA-8x88-c5mf-7j5w", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 8.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE"}}], "affected": [{"vendor": "isaacs", "product": "node-tar", "versions": [{"status": "affected", "version": "< 7.5.18"}]}], "references": [{"url": "https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w", "name": "https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5", "name": "https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/isaacs/node-tar/releases/tag/v7.5.18", "name": "https://github.com/isaacs/node-tar/releases/tag/v7.5.18", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, tar.replace accepts a checksum-valid tar header with a negative base-256 encoded entry size, causing the archive scanner to make no progress while repeatedly parsing the same header. This issue is fixed in version 7.5.18."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-835", "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-08T15:23:47.527Z"}}}, "cveMetadata": {"cveId": "CVE-2026-59874", "state": "PUBLISHED", "dateUpdated": "2026-07-08T17:00:42.937Z", "dateReserved": "2026-07-07T15:41:53.607Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-08T15:23:47.527Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}