{"answers":{"affected":"3 open source packages ship an affected version, including oras.land/oras-go/v2.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85731 exists.","fix":"Upgrade oras.land/oras-go/v2 to 2.6.2 or later.","what":"CVE-2026-85731 is a high-severity path traversal vulnerability in oras-project oras-go, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-85731 and fix it if it is affected.\n\nWhat it is: CVE-2026-85731 is a high-severity path traversal vulnerability in oras-project oras-go, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85731 exists.\n\nAffected packages and fixed versions:\n- oras.land/oras-go/v2 (Go): affected all versions; fixed in 2.6.2\n- oras.land/oras-go/v2 (Go): affected all versions; fixed in 2.6.2\n- oras.land/oras-go/v2 (Go): affected all versions; fixed in 2.6.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-85731/ (Markdown: https://insights.sbomify.com/CVE-2026-85731/index.md)","id":"CVE-2026-85731","markdown":"https://insights.sbomify.com/CVE-2026-85731/index.md","name":"CVE-2026-85731","record":{"aliases":["CLEANSTART-2026-DR73379","CLEANSTART-2026-JS28997","CLEANSTART-2026-VN99750","DEBIAN-CVE-2026-85731","ECHO-5e20-171c-362a","GHSA-m37j-52j7-pjw7","GO-2026-6499","MINI-23mm-jh9v-8rxw","MINI-2566-r6rp-hpg2","MINI-25f6-2mgj-mpx9","MINI-28r9-852j-93rr","MINI-2938-jqgv-j2rw","MINI-29cr-rv72-q9m8","MINI-2c8r-pxc5-cppv","MINI-2c98-7qm7-2g6v","MINI-2gf9-vh79-6m9m","MINI-2gjh-wgf5-789m","MINI-2jmh-hhj4-226q","MINI-2jqw-9q25-68h9","MINI-2r7r-rwcc-8fhr","MINI-2rwr-rxqx-wwc5","MINI-3924-w85c-w8xp","MINI-3pr3-33h4-4m6j","MINI-3pv2-qf92-23qm","MINI-452x-fhvg-4fpr","MINI-46jr-8pww-9vrr","MINI-4j86-58fm-7w6c","MINI-4jc5-7g5f-v44h","MINI-4jg4-63rc-gg66","MINI-4pfv-7hrj-pgfc","MINI-4pxx-cv62-cx6m","MINI-4vhm-7429-pw73","MINI-52ww-3qv7-fr8m","MINI-53hf-wpgx-9c72","MINI-54q5-gw98-j3mh","MINI-559j-c4gj-m4qm","MINI-55cw-w97f-p37v","MINI-55w5-vwqf-4h3h","MINI-568v-mhx8-cv69","MINI-582w-8xxx-hv3x","MINI-5g2j-74cv-jvh4","MINI-5hr9-7xm3-gfmm","MINI-5mq3-gjhf-439x","MINI-5mvx-2vp7-538p","MINI-5p7j-h486-wgmx","MINI-5vxq-vrh3-ph22","MINI-6234-7w43-6gmw","MINI-62v6-2fmm-wf39","MINI-63jf-q53h-g9hv","MINI-64xr-qmgh-hvm2","MINI-6527-px23-m7x6","MINI-6f8h-47m3-v2xw","MINI-6jmq-qpjm-rp42","MINI-6jpr-6w86-grc5","MINI-6mqw-5hgf-wr4c","MINI-6r3q-546q-c69f","MINI-6rpv-5ffc-v64q","MINI-6vq7-jgxr-5753","MINI-6vr5-364c-6rpm","MINI-6vwc-c75g-mmcp","MINI-6wpc-7969-r94c","MINI-7cjx-x39c-524v","MINI-7jrv-cf99-jfc8","MINI-7qxw-3w4h-wr2q","MINI-7x5x-6q82-hpm5","MINI-834p-p567-qhrg","MINI-89m3-967w-9qrp","MINI-89w6-4h28-wc36","MINI-8c38-r3w5-285j","MINI-8f3g-8fc7-vq8f","MINI-8fq2-xmpr-cv77","MINI-8fx8-px5v-rw6w","MINI-8g5h-hw9q-c8qv","MINI-8p27-c8hv-76j2","MINI-8rf4-39hq-h6cj","MINI-8w7g-g8wg-prf6","MINI-93qp-4868-2frj","MINI-948v-cpwp-wmx7","MINI-95fw-3rxp-j622","MINI-95w6-6855-gcq7","MINI-96j2-hwjv-62mc","MINI-9948-j4r2-wjgp","MINI-99v8-6vvw-3rh6","MINI-9hf8-fg73-8jmq","MINI-9j5r-6g98-36rp","MINI-9m43-224r-r3g7","MINI-9q67-2x23-wwqf","MINI-9vqj-4f2j-7w57","MINI-c26j-fq85-2prp","MINI-c389-cvcm-c3x9","MINI-ccpw-xvf8-r2px","MINI-cf7m-3w4j-p7gg","MINI-ch8j-4559-m4j9","MINI-cjfr-w4fr-chp8","MINI-cqv6-qx52-cmjq","MINI-cqwr-2c8g-64qc","MINI-cr3c-82xj-5xj3","MINI-crpq-83jh-rm7m","MINI-f2xx-6pvq-47cw","MINI-f3jg-7j8h-gr49","MINI-f6cc-9mp9-5fhr","MINI-fccm-g7rx-9wmf","MINI-fh8q-73gm-jgp7","MINI-fj7q-pvv9-6r6f","MINI-fmvq-mh5m-xqv4","MINI-fprx-38v3-f444","MINI-g39m-ff5r-mvw7","MINI-g5fh-q3m7-3vrf","MINI-g6qc-gx7q-h54r","MINI-g86m-q5fx-wxm2","MINI-g8q3-2cfx-8gp2","MINI-gcvc-wf7v-j5w9","MINI-ghrv-j499-c5gf","MINI-gj3m-6pf4-cr6v","MINI-gpx5-vcfc-8mh7","MINI-gqrx-4m4w-2wf8","MINI-gr7j-w234-cq6v","MINI-gx77-222c-86mw","MINI-h25w-95hf-7f29","MINI-h643-6vr9-5rjp","MINI-h6w3-fwpr-qfrv","MINI-h7qq-m33g-4m9g","MINI-hccw-4cfv-fgqg","MINI-hf7v-crxc-x433","MINI-hj96-xh43-px3m","MINI-hp72-9qfx-5874","MINI-hqph-pmqr-9jff","MINI-j6p2-ph5g-rv57","MINI-j82q-h46x-q924","MINI-j9vg-gh43-8mgg","MINI-jgf9-583h-83xr","MINI-jhjf-97j7-6hh8","MINI-jhvf-428v-3x4m","MINI-jjv5-8gh8-8244","MINI-jrg7-xrq9-mm74","MINI-jv3w-56pv-fmrq","MINI-m2w2-44g3-jgg5","MINI-m449-63px-7gx2","MINI-m465-4p3w-v4fx","MINI-m6rf-hmm4-gcqj","MINI-m832-h4qm-5fvf","MINI-m83g-8m3m-h4f9","MINI-mgvg-wgx3-m5j8","MINI-mqp4-2222-fvpp","MINI-mvf6-87qj-2fm5","MINI-p49v-m7cj-648x","MINI-pfxx-9cfx-m6m2","MINI-pj5p-2456-3752","MINI-pm3x-r6mx-wv8x","MINI-pp2r-q543-7v8h","MINI-pv8g-3r63-5cq7","MINI-q326-px56-8phh","MINI-q3j9-v4f9-6fx7","MINI-q7m7-7562-pqpf","MINI-q8hc-p6q3-38q2","MINI-q953-qxj4-6whm","MINI-qfp3-6f6r-f75q","MINI-r2qq-wp27-qcj7","MINI-r6cv-7v2q-x75v","MINI-r6qx-5rr5-prc7","MINI-r7w2-mvw9-6g83","MINI-r895-wgm2-4x59","MINI-r9gx-pj2r-rxrj","MINI-r9r7-5v52-5c3p","MINI-rmhp-fh2m-8j2r","MINI-rr9h-cjg7-w7hf","MINI-rx6j-hv93-p798","MINI-v6v4-42mw-x3gw","MINI-v73w-cxjh-xx2p","MINI-v76x-9627-p8pg","MINI-v94v-782m-w6qq","MINI-vmgh-4hx3-2h9r","MINI-vr6x-xj8x-v269","MINI-vvxf-273p-gwrq","MINI-w25p-jmxc-426m","MINI-w446-3c3h-vr8p","MINI-w736-4chq-72fj","MINI-w85c-wfww-h7wh","MINI-w8r3-rc46-h7m6","MINI-whmc-h6xp-w2qr","MINI-wwww-267w-8mh6","MINI-x68h-pc83-g23m","MINI-xj4f-wh65-9ppc","MINI-xm5r-829h-h6xq","MINI-xp4g-x38q-vc8j","MINI-xqmq-wjfc-p9gq","MINI-xxhv-3xj7-fw3m","MINI-xxv7-8x88-p62x","ROOT-APP-GOBINARY-CVE-2026-85731","UBUNTU-CVE-2026-85731"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Go OCI artifact library","requires_auth":"none","summary":"Attackers can overwrite arbitrary files via symlink chains in OCI layer extraction, potentially leading to code execution.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"oras-go is a Go library for managing OCI artifacts. Prior to 2.6.2, content/file.Store extraction of OCI layers marked with io.deis.oras.content.unpack=true can write outside the store working directory. The pushDir path through extractTarDirectory and ensureLinkPath validates symlink targets lexically, resolveRelToBase skips its parent-symlink walk for root-level entries, and writeFile follows a terminal symlink when opening a regular file. A malicious archive can therefore create a symlink chain whose lexical target remains inside the extraction root but whose resolved target is an attacker-selected absolute path, then overwrite that target with a same-named regular-file entry even when AllowPathTraversalOnWrite is false. Pulling an attacker-controlled artifact can create or overwrite any file writable by the process and may lead to code execution. This issue is fixed in version 2.6.2.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"oras-go: Arbitrary file write outside file.Store root via symlink-chain bypass in tar extraction (pushDir)","id":"CVE-2026-85731","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"oras-go: Blind SSRF via unvalidated Link header URL in pagination allows internal network probing","id":"CVE-2026-85732"},"packages":[{"ecosystem":"Go","fixed":["2.6.2"],"introduced":["0"],"last_affected":[],"package":"oras.land/oras-go/v2","purl":null,"source":"GHSA-m37j-52j7-pjw7"},{"ecosystem":"Go","fixed":["2.6.2"],"introduced":["0"],"last_affected":[],"package":"oras.land/oras-go/v2","purl":"pkg:golang/oras.land/oras-go/v2","source":"GHSA-m37j-52j7-pjw7"},{"ecosystem":"Go","fixed":["2.6.2"],"introduced":["0"],"last_affected":[],"package":"oras.land/oras-go/v2","purl":"pkg:golang/oras.land/oras-go/v2","source":"GO-2026-6499"}],"prev":{"headline":"smol-toml: Denial of Service via malformed TOML documents","id":"CVE-2026-85730"},"products":["oras-go"],"published":"2026-09-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-16","vendors":["oras-project"]},"summary":"Attackers can overwrite arbitrary files via symlink chains in OCI layer extraction, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2026-85731/"}