{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33056", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-17T18:10:50.213Z", "datePublished": "2026-03-20T07:11:10.448Z", "dateUpdated": "2026-03-20T07:11:10.448Z"}, "containers": {"cna": {"title": "tar-rs: unpack_in can chmod arbitrary directories by following symlinks", "problemTypes": [{"descriptions": [{"cweId": "CWE-61", "lang": "en", "description": "CWE-61: UNIX Symbolic Link (Symlink) Following", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.1, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph"}, {"name": "https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446", "tags": ["x_refsource_MISC"], "url": "https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446"}], "affected": [{"vendor": "alexcrichton", "product": "tar-rs", "versions": [{"version": "< 0.4.45", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-20T07:11:10.448Z"}, "descriptions": [{"lang": "en", "value": "tar-rs is a tar archive reading/writing library for Rust. In versions 0.4.44 and below, when unpacking a tar archive, the tar crate's unpack_dir function uses fs::metadata() to check whether a path that already exists is a directory. Because fs::metadata() follows symbolic links, a crafted tarball containing a symlink entry followed by a directory entry with the same name causes the crate to treat the symlink target as a valid existing directory \u2014 and subsequently apply chmod to it. This allows an attacker to modify the permissions of arbitrary directories outside the extraction root. This issue has been fixed in version 0.4.45."}], "source": {"advisory": "GHSA-j4xf-2g29-59ph", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "tar-rs is a tar archive reading/writing library for Rust. In versions 0.4.44 and below, when unpacking a tar archive, the tar crate's unpack_dir function uses fs::metadata() to check whether a path that already exists is a directory. Because fs::metadata() follows symbolic links, a crafted tarball containing a symlink entry followed by a directory entry with the same name causes the crate to treat the symlink target as a valid existing directory \u2014 and subsequently apply chmod to it. This allows an attacker to modify the permissions of arbitrary directories outside the extraction root. This issue has been fixed in version 0.4.45."}], "id": "CVE-2026-33056", "lastModified": "2026-03-20T08:16:11.603", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-20T08:16:11.603", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446"}, {"source": "security-advisories@github.com", "url": "https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-61"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.4.45)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "tar-rs", "source": "cna", "vendor": "alexcrichton"}, "product": "tar-rs", "vendor": "alexcrichton"}], "analysis": {"en": {"generated_at": "2026-03-20T08:20:41.334179+00:00", "value": {"mitigation_remediation": ["Upgrade tar-rs to version 0.4.45 or later."], "summary": {"action": "Apply Patch", "impact": "Permission Modification"}, "threat_synthesis": {"affected_systems": "Affected by vendor alexcrichton tar-rs versions 0.4.44 and earlier. The issue is fixed in version 0.4.45; any deployments using 0.4.44 or older are potentially vulnerable. ", "description_and_impact": "This vulnerability occurs in the tar-rs library, a Rust tar archive reader/writer. Prior to version 0.4.45, the unpack_dir function calls fs::metadata() to determine if a path is a directory. Because fs::metadata() follows symbolic links, a crafted tarball that contains a symlink entry immediately followed by a directory entry bearing the same name can trick the library into treating the symlink target as a valid directory. The library then applies a chmod operation to the target directory, allowing an attacker to modify permissions on any directory outside the intended extraction root. The primary impact is the ability to change file system permissions, which could lead to privilege escalation or other integrity compromise. The weakness is classified as CWE-61: Improper Handling of Symbolic Links. ", "risk_and_exploitability": "The CVSS base score is 5.1, indicating a moderate level of severity. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. The attack likely requires the ability to supply a crafted tar archive to an application that uses tar-rs for extraction; this could be a local development workflow, a build pipeline, or a server that processes user-supplied archives. While the exploit vector is primarily local or through a trusted channel, the consequences of permission modification can be severe if the target system has privileged services or shared resources. The risk remains significant until the library is updated or mitigations are applied. "}}}}, "created": "2026-03-20T08:52:15.623372+00:00", "updated": "2026-03-20T10:36:54.715372+00:00", "vendors": ["alexcrichton", "alexcrichton$PRODUCT$tar-rs"]}