Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/506961?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/506961?format=api", "purl": "pkg:apk/alpine/rust@1.83.0-r1?arch=armv7&distroversion=v3.21&reponame=main", "type": "apk", "namespace": "alpine", "name": "rust", "version": "1.83.0-r1", "qualifiers": { "arch": "armv7", "distroversion": "v3.21", "reponame": "main" }, "subpath": "", "is_vulnerable": false, "next_non_vulnerable_version": null, "latest_non_vulnerable_version": null, "affected_by_vulnerabilities": [], "fixing_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/24628?format=api", "vulnerability_id": "VCID-qj1y-b8m1-hyfm", "summary": "tar-rs `unpack_in` can chmod arbitrary directories by following symlinks\n## Summary\n\nWhen 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 — and subsequently apply `chmod` to it. This allows an attacker to modify the permissions of arbitrary directories outside the extraction root.\n\n## Reproducer\n\nA malicious tarball contains two entries: (1) a symlink `foo` pointing to an arbitrary external directory, and (2) a directory entry `foo/.` (or just `foo`). When unpacked, `create_dir(\"foo\")` fails with `EEXIST` because the symlink is already on disk. The `fs::metadata()` check then follows the symlink, sees a directory at the target, and allows processing to continue. The directory entry's mode bits are then applied via `chmod`, which also follows the symlink — modifying the permissions of the external target directory.\n\n## Fix \n\nThe fix is very simple, we now use `fs::symlink_metadata()` in `unpack_dir`, so symlinks are detected and rejected rather than followed.\n\n## Credit\n\nThis issue was reported by @xokdvium - thank you!", "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33056.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.4", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33056.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-33056", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.01448", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.01422", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.01431", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.0144", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.01446", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.01441", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.01436", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.00011", "scoring_system": "epss", "scoring_elements": "0.01432", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00012", "scoring_system": "epss", "scoring_elements": "0.01946", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.00012", "scoring_system": "epss", "scoring_elements": "0.01916", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.00012", "scoring_system": "epss", "scoring_elements": "0.01922", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.00012", "scoring_system": "epss", "scoring_elements": "0.01912", "published_at": "2026-04-26T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-33056" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33056", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33056" }, { "reference_url": "https://github.com/alexcrichton/tar-rs", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N" }, { "value": "5.1", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/alexcrichton/tar-rs" }, { "reference_url": "https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N" }, { "value": "5.1", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-20T12:59:15Z/" } ], "url": "https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446" }, { "reference_url": "https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N" }, { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "5.1", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-20T12:59:15Z/" } ], "url": "https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33056", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N" }, { "value": "5.1", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33056" }, { "reference_url": "https://rustsec.org/advisories/RUSTSEC-2026-0067.html", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N" }, { "value": "5.1", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://rustsec.org/advisories/RUSTSEC-2026-0067.html" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1131481", "reference_id": "1131481", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1131481" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449490", "reference_id": "2449490", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449490" }, { "reference_url": "https://github.com/advisories/GHSA-j4xf-2g29-59ph", "reference_id": "GHSA-j4xf-2g29-59ph", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-j4xf-2g29-59ph" }, { "reference_url": "https://usn.ubuntu.com/8138-1/", "reference_id": "USN-8138-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/8138-1/" }, { "reference_url": "https://usn.ubuntu.com/8138-2/", "reference_id": "USN-8138-2", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/8138-2/" }, { "reference_url": "https://usn.ubuntu.com/8139-1/", "reference_id": "USN-8139-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/8139-1/" }, { "reference_url": "https://usn.ubuntu.com/8168-1/", "reference_id": "USN-8168-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/8168-1/" }, { "reference_url": "https://usn.ubuntu.com/8168-2/", "reference_id": "USN-8168-2", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/8168-2/" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/506961?format=api", "purl": "pkg:apk/alpine/rust@1.83.0-r1?arch=armv7&distroversion=v3.21&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/rust@1.83.0-r1%3Farch=armv7&distroversion=v3.21&reponame=main" } ], "aliases": [ "CVE-2026-33056", "GHSA-j4xf-2g29-59ph" ], "risk_score": 3.1, "exploitability": "0.5", "weighted_severity": "6.2", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-qj1y-b8m1-hyfm" } ], "risk_score": null, "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/rust@1.83.0-r1%3Farch=armv7&distroversion=v3.21&reponame=main" }