{"id":"CVE-2026-105163","aliases":["EUVD-2026-92128","GHSA-92mr-7mjc-w93g","GHSA-mf7q-r4rv-jv94","GO-2026-6302"],"status":"published","title":"crossplane crossplane-runtime ImageConfig client.go Get toctou","description":"A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be launched remotely. Upgrading to version 2.2.3, 2.3.3 and 2.4.0-rc.1 is able to resolve this issue. The patch is identified as bee99c6cd6ca81878acca2940a2f0a02169fc208. You should upgrade the affected component.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00322,"percentile":0.25576,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-345","CWE-362","CWE-367"],"published":"2026-08-27T17:25:25Z","modified":"2026-10-28T02:30:57Z","fixes":[{"ecosystem":"Go","package":"github.com/crossplane/crossplane-runtime/v2","fixed_in":["2.4.0-rc.1","2.3.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/crossplane/crossplane-runtime/v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0-rc.0"},{"last_affected":"2.4.0-rc.0"},{"fixed":"2.4.0-rc.1"}]}],"versions":["2.4.0-rc.0"]},{"source":"ghsa","ecosystem":"Go","package":"github.com/crossplane/crossplane-runtime/v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.0"},{"last_affected":"2.3.2"},{"fixed":"2.3.3"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/crossplane/crossplane-runtime/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.4.0-rc.0"},{"fixed":"2.4.0-rc.1"}]}],"versions":["2.4.0-rc.0"]},{"source":"osv","ecosystem":"Go","package":"github.com/crossplane/crossplane-runtime/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.3.0"},{"fixed":"2.3.3"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/crossplane/crossplane-runtime/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.3.0"},{"fixed":"2.3.3"},{"introduced":"2.4.0-rc.0"},{"fixed":"2.4.0-rc.1"}]}]}],"products":[{"vendor":"crossplane","product":"crossplane-runtime"}],"references":[{"url":"https://vuldb.com/vuln/413395","tags":["vdb-entry","technical-description","advisory"]},{"url":"https://vuldb.com/vuln/413395/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-105163","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/advisories/GHSA-mf7q-r4rv-jv94","tags":["issue-tracking","report"]},{"url":"https://github.com/crossplane/crossplane-runtime/pull/1038","tags":["issue-tracking","patch","fix"]},{"url":"https://github.com/crossplane/crossplane-runtime/commit/bee99c6cd6ca81878acca2940a2f0a02169fc208","tags":["patch","fix"]},{"url":"https://github.com/crossplane/crossplane-runtime/releases/tag/v2.2.3","tags":["patch","fix"]},{"url":"https://github.com/crossplane/crossplane-runtime/","tags":["product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105163","tags":["advisory"]},{"url":"https://github.com/crossplane/crossplane-runtime","tags":["package"]},{"url":"https://github.com/advisories/GHSA-92mr-7mjc-w93g"},{"url":"https://github.com/crossplane/crossplane-runtime/security/advisories/GHSA-mf7q-r4rv-jv94","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105163.json","tags":["advisory"]},{"url":"https://github.com/crossplane/crossplane-runtime/releases/tag/v2.3.3","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-105163","title":"crossplane crossplane-runtime ImageConfig client.go Get toctou","description":"A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be launched remotely. Upgrading to version 2.2.3, 2.3.3 and 2.4.0-rc.1 is able to resolve this issue. The patch is identified as bee99c6cd6ca81878acca2940a2f0a02169fc208. You should upgrade the affected component.","status":"published","published":"2026-10-04T21:30:12.785Z","modified":"2026-10-05T15:11:53.371Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N/E:ND/RL:OF/RC:C","assessor":"cna"}],"cwes":["CWE-367","CWE-362"],"updated_at":"2026-11-02T14:19:57.100857Z"}],"euvd":[{"id":"EUVD-2026-92128","description":"A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be launched remotely. Upgrading to version 2.2.3, 2.3.3 and 2.4.0-rc.1 is able to resolve this issue. The patch is identified as bee99c6cd6ca81878acca2940a2f0a02169fc208. You should upgrade the affected component.","status":"published","published":"2026-10-04T21:30:12Z","modified":"2026-10-05T15:11:53Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X","level":"medium"}],"updated_at":"2026-11-02T17:27:39.819382Z"}],"ghsa":[{"id":"GHSA-92mr-7mjc-w93g","title":"A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This...","description":"A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be launched remotely. Upgrading to version 2.2.3, 2.3.3 and 2.4.0-rc.1 is able to resolve this issue. The patch is identified as bee99c6cd6ca81878acca2940a2f0a02169fc208. You should upgrade the affected component.","status":"published","published":"2026-10-05T00:30:25Z","modified":"2026-10-05T00:30:32Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:12:47.41114Z"},{"id":"GHSA-mf7q-r4rv-jv94","title":"Crossplane's TOCTOU between cosign verification and image fetch in xpkg.CachedClient allows tag-based package install to bypass signature check","description":"## Summary\n\nCrossplane allows package signature verification to be configured via the `ImageConfig` mechanism. When enabled, the package manager uses cosign to verify that packages are correctly signed before pulling and installing them.\n\nWhen a package is installed using a tag reference (e.g., a semantic version), a malicious OCI registry could serve a correctly signed image for verification, then subsequently serve an unsigned image for installation. This is possible because Crossplane resolves the tag reference separately for each step.\n\nThis vulnerability is relevant only for users who do all three of the following:\n\n1. Configure signature verification for packages,\n2. Install packages using tag references rather than digests, and\n3. Install packages from registries they do not control.\n\n## Mitigation\n\nInstalling packages by image digest rather than using tags avoids this issue.\n\n## Fix\n\nThe package manager has been updated to resolve tag references once and use the resulting digest for both signature verification and image fetching. This ensures that Crossplane pulls the same content that had its signature verified. The fix has been applied to Crossplane's `main` branch and backported to the v2.3 and v2.2 release branches; it will be released in v2.3.3 and v2.2.3.\n\n## Credits\n\nThis issue was reported, independently, by @bugbunny-research and @tonghuaroot.","status":"published","published":"2026-08-27T17:25:25Z","modified":"2026-08-27T17:25:26Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-345","CWE-367"],"updated_at":"2026-11-02T14:41:07.031507Z"}],"nvd":[{"id":"CVE-2026-105163","description":"A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be launched remotely. Upgrading to version 2.2.3, 2.3.3 and 2.4.0-rc.1 is able to resolve this issue. The patch is identified as bee99c6cd6ca81878acca2940a2f0a02169fc208. You should upgrade the affected component.","status":"published","published":"2026-10-04T22:16:58.763Z","modified":"2026-10-06T15:04:52.637Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-362","CWE-367"],"updated_at":"2026-11-02T14:12:53.75133Z"}],"osv":[{"id":"CVE-2026-105163","title":"crossplane crossplane-runtime ImageConfig client.go Get toctou","description":"A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be launched remotely. Upgrading to version 2.2.3, 2.3.3 and 2.4.0-rc.1 is able to resolve this issue. The patch is identified as bee99c6cd6ca81878acca2940a2f0a02169fc208. You should upgrade the affected component.","status":"published","published":"2026-10-04T21:30:12.785Z","modified":"2026-10-28T02:30:57.507351003Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X","level":"medium"}],"cwes":["CWE-362","CWE-367"],"updated_at":"2026-11-02T15:44:54.583213Z"},{"id":"GHSA-mf7q-r4rv-jv94","title":"Crossplane's TOCTOU between cosign verification and image fetch in xpkg.CachedClient allows tag-based package install to bypass signature check","description":"## Summary\n\nCrossplane allows package signature verification to be configured via the `ImageConfig` mechanism. When enabled, the package manager uses cosign to verify that packages are correctly signed before pulling and installing them.\n\nWhen a package is installed using a tag reference (e.g., a semantic version), a malicious OCI registry could serve a correctly signed image for verification, then subsequently serve an unsigned image for installation. This is possible because Crossplane resolves the tag reference separately for each step.\n\nThis vulnerability is relevant only for users who do all three of the following:\n\n1. Configure signature verification for packages,\n2. Install packages using tag references rather than digests, and\n3. Install packages from registries they do not control.\n\n## Mitigation\n\nInstalling packages by image digest rather than using tags avoids this issue.\n\n## Fix\n\nThe package manager has been updated to resolve tag references once and use the resulting digest for both signature verification and image fetching. This ensures that Crossplane pulls the same content that had its signature verified. The fix has been applied to Crossplane's `main` branch and backported to the v2.3 and v2.2 release branches; it will be released in v2.3.3 and v2.2.3.\n\n## Credits\n\nThis issue was reported, independently, by @bugbunny-research and @tonghuaroot.","status":"published","published":"2026-08-27T17:25:25Z","modified":"2026-10-05T10:55:34.924298945Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-345","CWE-367"],"updated_at":"2026-11-02T15:46:51.811331Z"},{"id":"GO-2026-6302","title":"Signature verification TOCTOU allows installing unverified package content in github.com/crossplane/crossplane-runtime/v2","description":"Signature verification TOCTOU allows installing unverified package content in github.com/crossplane/crossplane-runtime/v2","status":"published","published":"2026-09-09T17:56:34Z","modified":"2026-10-05T10:55:34.924298945Z","updated_at":"2026-11-02T15:47:03.11707Z"}]}}