{"id":"CVE-2026-100348","aliases":["DEBIAN-CVE-2026-100348","EUVD-2026-102151","GHSA-mh7x-f8wq-4jhx","GO-2026-6789","RHSA-2026:76677","RHSA-2026:82637","RHSA-2026:85266","UBUNTU-CVE-2026-100348","openSUSE-SU-2026:12164-1"],"status":"published","title":"kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)","description":"kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00372,"percentile":0.31392,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2026-10-10T10:21:53Z","modified":"2026-11-05T23:26:06Z","fixes":[{"ecosystem":"Go","package":"github.com/getkin/kin-openapi","fixed_in":["0.145.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/getkin/kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.144.0"},{"fixed":"0.145.0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"golang-github-getkin-kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.110.0-1","0.117.0-1","0.118.0-1","0.120.0-1","0.122.0-1","0.122.0-2","0.122.0-3","0.123.0-1","0.124.0-1","0.135.0-1"]},{"source":"osv","ecosystem":"Debian:13","package":"golang-github-getkin-kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.124.0-1","0.135.0-1"]},{"source":"osv","ecosystem":"Debian:14","package":"golang-github-getkin-kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.124.0-1","0.135.0-1"]},{"source":"osv","ecosystem":"Go","package":"github.com/getkin/kin-openapi","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.145.0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/getkin/kin-openapi","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.145.0"}]}]},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"grafana12.4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.4.12-0.4.hum1"}]}],"bundled":12},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"hugo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.168.0-0.1.hum1"}]}],"bundled":9},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"grafana13.2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:13.2.3-0.3.hum1"}]}],"bundled":9},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"golang-github-getkin-kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.32.0-2","0.80.0-1","0.85.0-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"golang-github-getkin-kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.117.0-1","0.120.0-1","0.122.0-3","0.123.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"golang-github-getkin-kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.124.0-1","0.135.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"golang-github-getkin-kin-openapi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.124.0-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"hugo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.168.0-2.1"}]}],"bundled":6}],"products":[{"vendor":"getkin","product":"kin-openapi"}],"references":[{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-mh7x-f8wq-4jhx","tags":["x_refsource_CONFIRM","advisory","web","article","report"]},{"url":"https://github.com/getkin/kin-openapi/commit/88aa64c7cbd03ecadbb419c473bdcaa8b0124c6b","tags":["x_refsource_MISC","fix","web","article","report"]},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.145.0","tags":["x_refsource_MISC","web","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100348","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mh7x-f8wq-4jhx"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100348.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-100348","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi","tags":["package"]},{"url":"https://access.redhat.com/errata/RHSA-2026:76677","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-56851","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-61801","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2024-24786","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-95502","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-101899","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-109855","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100347","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100348","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100349","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100350","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100351","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-97394","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_76677.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2268046","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-24786","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-24786","tags":["advisory"]},{"url":"https://go.dev/cl/569356","tags":["article"]},{"url":"https://groups.google.com/g/golang-announce/c/ArQ6CDgtEjY/","tags":["article"]},{"url":"https://pkg.go.dev/vuln/GO-2024-2611","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2547607","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-56851","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56851","tags":["advisory"]},{"url":"https://go.dev/cl/793360","tags":["article"]},{"url":"https://go.dev/issue/80112","tags":["article"]},{"url":"https://pkg.go.dev/vuln/GO-2026-6629","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2548048","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61801","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61801","tags":["advisory"]},{"url":"https://github.com/moby/sys/commit/85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe","tags":["article"]},{"url":"https://github.com/moby/sys/pull/221","tags":["article"]},{"url":"https://github.com/moby/sys/security/advisories/GHSA-mjcv-p78q-w5fw","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2550709","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-95502","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-95502","tags":["advisory"]},{"url":"https://grafana.com/security/security-advisories/cve-2026-95502","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553575","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97394","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97394","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/30e292371a89ca6d1f91a9553e0aa518b49f838d","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.143.0","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-p6wj-qrr4-pgh5","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553580","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100347","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100347","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/f1a5b523b82868d2d9be2e116b4e942892be72c3","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-fh4f-47mf-f2gj","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553571","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100348","tags":["advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553589","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100349","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100349","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/f5441d67f855ed34d975b3b85665764644ab1459","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.146.0","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-74vm-87hj-r66f","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553584","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100350","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100350","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/d090e36b2f1c42c898ba2a687a8f6e25f5ca727f","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-h4r5-mxv5-8mjc","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553587","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100351","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100351","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/eda80e2676e9f577ceed2dd80e64f16083edb041","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.147.0","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-23vg-4cjm-66q5","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2550659","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-101899","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101899","tags":["advisory"]},{"url":"https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","tags":["article"]},{"url":"https://github.com/axios/axios/pull/11141","tags":["article"]},{"url":"https://github.com/axios/axios/releases/tag/v1.20.0","tags":["article"]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-44g4-m2mj-wpvx","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553103","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109855","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109855","tags":["advisory"]},{"url":"https://cna.openjsf.org/security-advisories.html","tags":["article"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-qq8j-7v2v-3rwp","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2026:82637","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100352","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100353","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-100354","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_82637.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553588","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100352","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100352","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/4487f198ab8be0c37d6ca72c54f5dca4dc25270e","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.148.0","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-rj39-cv6w-8wv7","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553592","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100353","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100353","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/9814d1f2b212f3508bf52296aa9e248b2122a5a9","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.149.0","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-vrcc-3ch7-hppw","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553590","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100354","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100354","tags":["advisory"]},{"url":"https://github.com/getkin/kin-openapi/commit/9245cef66c840e27a08409a8a5cd0ee930c5bcff","tags":["article"]},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-g8cf-rcjf-c8cf","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2026:85266","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-110816","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-93450","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_85266.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2538979","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93450","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93450","tags":["advisory"]},{"url":"https://github.com/go-openapi/swag","tags":["article"]},{"url":"https://github.com/go-openapi/swag/blob/v0.27.0/jsonutils/adapters/stdlib/json/adapter.go#L68","tags":["article"]},{"url":"https://github.com/go-openapi/swag/blob/v0.27.0/jsonutils/adapters/stdlib/json/ordered_map.go#L214","tags":["article"]},{"url":"https://github.com/go-openapi/swag/commit/0c24346ced59a25811e8694a915e7131d25ccb0e","tags":["article"]},{"url":"https://github.com/go-openapi/swag/security/advisories/GHSA-xh24-9qpg-8w28","tags":["article"]},{"url":"https://www.vulncheck.com/advisories/go-openapi-swag-jsonutils-before-0.27.1-uncontrolled-recursion-in-ordered-json-marshal-and-unmarshal","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552954","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-110816","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110816","tags":["advisory"]},{"url":"https://github.com/ljharb/qs/commit/a952e7519338ef0cfb25694a2988848f93333727","tags":["article"]},{"url":"https://github.com/ljharb/qs/security/advisories/GHSA-6pq8-jhm2-2vcw","tags":["article"]},{"url":"https://ubuntu.com/security/CVE-2026-100348","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-100347","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-100348","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-100349","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-100350","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-100351","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-100352","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-100348","title":"kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)","description":"kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.","status":"published","published":"2026-10-15T15:31:19.904Z","modified":"2026-10-15T15:44:17.041Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:20:06.925367Z"}],"euvd":[{"id":"EUVD-2026-102151","description":"kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.","status":"published","published":"2026-10-15T15:31:19Z","modified":"2026-10-15T15:44:17Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T17:00:13.422137Z"}],"ghsa":[{"id":"GHSA-mh7x-f8wq-4jhx","title":"kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)","description":"The defect\n----------\nConfirmed at HEAD (f0407d5, v0.144.0). openapi3/loader.go, inside resolveComponent's drill closure (around line 455), the case *SchemaRef branch for pathPart == \"additionalProperties\" dereferences c.Value.AdditionalProperties with no nil-check on c.Value:\n\n    case *SchemaRef:\n        if pathPart == \"additionalProperties\" {\n            if ap := c.Value.AdditionalProperties.Has; ap != nil {   // c.Value can be nil here\n                cursor = *ap\n            } else {\n                cursor = c.Value.AdditionalProperties.Schema\n            }\n            attempted = true\n        }\n\nWhen a $ref fragment drills through .../additionalProperties of a schema whose Value is still nil (a pure, not-yet-resolved $ref, or a self-reference resolved before its own Value is set), c.Value is nil and the .AdditionalProperties access panics.\n\nInput and attacker\n-------------------\nA tiny crafted OpenAPI document, one schema, no external refs, no network:\n\n    openapi: 3.0.3\n    info: {title: t, version: \"1.0.0\"}\n    paths: {}\n    components:\n      schemas:\n        A:\n          $ref: '#/components/schemas/A/additionalProperties'\n\nAttacker model: any service or tool that loads an untrusted spec via the default openapi3.Loader (LoadFromData / LoadFromFile / LoadFromURI), e.g. a spec registry, an API-management platform ingesting user specs, a linter, or a converter. It crashes during LOAD (ResolveRefsIn), before Validate.\n\nVerification level\n------------------\nEXECUTED with negative controls (agent-run go test at HEAD f0407d5, including yesterday's security merge; the bug is still present). The full stack pins LoadFromData:196 -\u003e ResolveRefsIn:274 -\u003e resolveSchemaRef:1048 -\u003e resolveComponent:485 -\u003e drill:439 -\u003e :455, propagating to main(); no recover() in loader.go/schema.go (grep + trace). Two negative controls stay clean: drilling additionalProperties of a resolved schema loads fine (the existing TestIssue376 happy path), and a normal recursive schema loads fine, so the nil Value is specifically the cause. I independently re-confirmed at HEAD that loader.go:455 dereferences c.Value.AdditionalProperties with no nil-check on c.Value. NOT verified: I did not enumerate every consumer's recover posture.\n\nSuggested fix\n-------------\nAdd if c.Value == nil { break } (fall through to the nil-safe drillIntoField) before touching c.Value.AdditionalProperties. One line.\n\nAlso cleared (stated, not claimed)\n----------------------------------\nThe allOf/anyOf $ref diamond does not blow up: Schema.validate threads its stack through the return and never pops it, acting as a global pointer-keyed visited-set (executed N=10..30, microseconds). External-ref SSRF/path-traversal is blocked by default (IsExternalRefsAllowed=false); the known custom-ReadFromURIFunc bypass is the already-banked downstream oasdiff item.\n\nAdvisory-source note\n--------------------\nFive-source enumeration: every kin-openapi advisory (CVE-2025-30153 plus the five fresh July-2026 GHSAs) is in openapi3filter (request validation); this finding is in the openapi3 loader, untouched by that systematic reporter and flagged un-analyzed by the prior oasdiff scout. Not contested on the loader surface as of today (a systematic hunter could pivot, so it decays; submit reasonably promptly).\n\nDedup\n-----\nDedup gate clean: no kin-openapi loader verdict in COVERED-INDEX, DISCLOSURE-INDEX or SCOUT-EXCLUDE (the one DISCLOSURE-INDEX hit is report #313, the downstream oasdiff, a different repo/lane).\n\nTooling\n-------\nAI assistance was used while investigating. The panic is executed-verified with negative controls (a one-schema self-referential additionalProperties $ref crashes LoadFromData while a resolved additionalProperties and a normal recursive schema load fine), and I confirmed at HEAD that loader.go:455 dereferences c.Value.AdditionalProperties with no nil-check on c.Value, on a load path with no recover.","status":"published","published":"2026-10-15T20:15:58Z","modified":"2026-10-15T20:16:00Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:41:32.483482Z"}],"nvd":[{"id":"CVE-2026-100348","description":"kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.","status":"published","published":"2026-10-15T16:17:30.477Z","modified":"2026-10-15T16:17:30.607Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:59.751798Z"}],"osv":[{"id":"CVE-2026-100348","title":"kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)","description":"kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.","status":"published","published":"2026-10-15T15:31:19.904Z","modified":"2026-11-05T23:26:06.783074313Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-06T00:02:13.631839Z"},{"id":"DEBIAN-CVE-2026-100348","description":"kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.","status":"published","published":"2026-10-15T16:17:30.477Z","modified":"2026-10-16T14:00:06.867282094Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:48.440897Z"},{"id":"GHSA-mh7x-f8wq-4jhx","title":"kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)","description":"The defect\n----------\nConfirmed at HEAD (f0407d5, v0.144.0). openapi3/loader.go, inside resolveComponent's drill closure (around line 455), the case *SchemaRef branch for pathPart == \"additionalProperties\" dereferences c.Value.AdditionalProperties with no nil-check on c.Value:\n\n    case *SchemaRef:\n        if pathPart == \"additionalProperties\" {\n            if ap := c.Value.AdditionalProperties.Has; ap != nil {   // c.Value can be nil here\n                cursor = *ap\n            } else {\n                cursor = c.Value.AdditionalProperties.Schema\n            }\n            attempted = true\n        }\n\nWhen a $ref fragment drills through .../additionalProperties of a schema whose Value is still nil (a pure, not-yet-resolved $ref, or a self-reference resolved before its own Value is set), c.Value is nil and the .AdditionalProperties access panics.\n\nInput and attacker\n-------------------\nA tiny crafted OpenAPI document, one schema, no external refs, no network:\n\n    openapi: 3.0.3\n    info: {title: t, version: \"1.0.0\"}\n    paths: {}\n    components:\n      schemas:\n        A:\n          $ref: '#/components/schemas/A/additionalProperties'\n\nAttacker model: any service or tool that loads an untrusted spec via the default openapi3.Loader (LoadFromData / LoadFromFile / LoadFromURI), e.g. a spec registry, an API-management platform ingesting user specs, a linter, or a converter. It crashes during LOAD (ResolveRefsIn), before Validate.\n\nVerification level\n------------------\nEXECUTED with negative controls (agent-run go test at HEAD f0407d5, including yesterday's security merge; the bug is still present). The full stack pins LoadFromData:196 -\u003e ResolveRefsIn:274 -\u003e resolveSchemaRef:1048 -\u003e resolveComponent:485 -\u003e drill:439 -\u003e :455, propagating to main(); no recover() in loader.go/schema.go (grep + trace). Two negative controls stay clean: drilling additionalProperties of a resolved schema loads fine (the existing TestIssue376 happy path), and a normal recursive schema loads fine, so the nil Value is specifically the cause. I independently re-confirmed at HEAD that loader.go:455 dereferences c.Value.AdditionalProperties with no nil-check on c.Value. NOT verified: I did not enumerate every consumer's recover posture.\n\nSuggested fix\n-------------\nAdd if c.Value == nil { break } (fall through to the nil-safe drillIntoField) before touching c.Value.AdditionalProperties. One line.\n\nAlso cleared (stated, not claimed)\n----------------------------------\nThe allOf/anyOf $ref diamond does not blow up: Schema.validate threads its stack through the return and never pops it, acting as a global pointer-keyed visited-set (executed N=10..30, microseconds). External-ref SSRF/path-traversal is blocked by default (IsExternalRefsAllowed=false); the known custom-ReadFromURIFunc bypass is the already-banked downstream oasdiff item.\n\nAdvisory-source note\n--------------------\nFive-source enumeration: every kin-openapi advisory (CVE-2025-30153 plus the five fresh July-2026 GHSAs) is in openapi3filter (request validation); this finding is in the openapi3 loader, untouched by that systematic reporter and flagged un-analyzed by the prior oasdiff scout. Not contested on the loader surface as of today (a systematic hunter could pivot, so it decays; submit reasonably promptly).\n\nDedup\n-----\nDedup gate clean: no kin-openapi loader verdict in COVERED-INDEX, DISCLOSURE-INDEX or SCOUT-EXCLUDE (the one DISCLOSURE-INDEX hit is report #313, the downstream oasdiff, a different repo/lane).\n\nTooling\n-------\nAI assistance was used while investigating. The panic is executed-verified with negative controls (a one-schema self-referential additionalProperties $ref crashes LoadFromData while a resolved additionalProperties and a normal recursive schema load fine), and I confirmed at HEAD that loader.go:455 dereferences c.Value.AdditionalProperties with no nil-check on c.Value, on a load path with no recover.","status":"published","published":"2026-10-15T20:15:58Z","modified":"2026-11-05T23:26:06.783074313Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-06T00:02:13.631839Z"},{"id":"RHSA-2026:76677","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-10-10T10:21:53Z","modified":"2026-10-20T10:43:34.285261674Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:22.928316Z"},{"id":"RHSA-2026:82637","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-10-17T10:21:05Z","modified":"2026-10-20T10:43:36.163539737Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RHSA-2026:85266","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-10-20T10:18:04Z","modified":"2026-10-20T10:43:38.38485781Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"UBUNTU-CVE-2026-100348","description":"kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.","status":"published","published":"2026-10-15T16:17:00Z","modified":"2026-10-28T17:50:26Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T16:55:58.519486Z"},{"id":"GO-2026-6789","title":"kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS) in github.com/getkin/kin-openapi","description":"kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS) in github.com/getkin/kin-openapi","status":"published","published":"2026-11-05T22:53:53Z","modified":"2026-11-05T23:15:12.653109369Z","updated_at":"2026-11-06T00:02:13.631839Z"},{"id":"openSUSE-SU-2026:12164-1","title":"hugo-0.168.0-2.1 on GA media","description":"These are all security issues fixed in the hugo-0.168.0-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-17T00:00:00Z","modified":"2026-10-18T11:15:03.240232812Z","updated_at":"2026-11-02T16:58:40.245664Z"}]}}