{"answers":{"affected":"3 open source packages ship an affected version, including github.com/projectcapsule/capsule.","exploited":"There is no known exploitation of CVE-2026-55636 in the wild and no public exploit code.","fix":"Upgrade github.com/projectcapsule/capsule to 0.13.6 or later.","what":"CVE-2026-55636 is a medium-severity missing authorization vulnerability in projectcapsule capsule, published on 15 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-55636 and fix it if it is affected.\n\nWhat it is: CVE-2026-55636 is a medium-severity missing authorization vulnerability in projectcapsule capsule, published on 15 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-55636 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/projectcapsule/capsule (Go): affected from 0.13.0; fixed in 0.13.6\n- github.com/projectcapsule/capsule (Go): affected from 0.13.0; fixed in 0.13.6\n- github.com/projectcapsule/capsule (Go): affected from 0.13.0; fixed in 0.13.6\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-2026-55636/ (Markdown: https://insights.sbomify.com/CVE-2026-55636/index.md)","id":"CVE-2026-55636","markdown":"https://insights.sbomify.com/CVE-2026-55636/index.md","name":"CVE-2026-55636","record":{"aliases":["GHSA-gwxr-7h77-7777","GO-2026-5406"],"analysis":{"component_type":"container_or_infrastructure","fix_type":"upgrade","impacts":["privilege_escalation","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Kubernetes multi-tenancy framework","requires_auth":"high_privilege","summary":"Attackers with specific RBAC permissions can bypass validation to modify namespace tenant labels due to a typo in webhook configuration.","user_interaction":"required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6, charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC can send a PUT request to /api/v1/namespaces/{namespace}/finalize, and the singular rule never matches the plural resource, so the validating webhook is not invoked and the user can change the namespace tenant label. matchPolicy: Equivalent does not compensate because it handles API group and version equivalence rather than resource-name errors. This vulnerability is fixed in 0.13.6.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Capsule: Incomplete fix of CVE-2026-30963: singular/plural typo leaves namespaces/finalize unprotected","id":"CVE-2026-55636","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"genieacs-mcp: DNS rebinding reaches local GenieACS MCP Streamable HTTP transport","id":"CVE-2026-55637"},"packages":[{"ecosystem":"Go","fixed":["0.13.6"],"introduced":["0.13.0"],"last_affected":[],"package":"github.com/projectcapsule/capsule","purl":null,"source":"GHSA-gwxr-7h77-7777"},{"ecosystem":"Go","fixed":["0.13.6"],"introduced":["0.13.0"],"last_affected":[],"package":"github.com/projectcapsule/capsule","purl":"pkg:golang/github.com/projectcapsule/capsule","source":"GHSA-gwxr-7h77-7777"},{"ecosystem":"Go","fixed":["0.13.6"],"introduced":["0.13.0"],"last_affected":[],"package":"github.com/projectcapsule/capsule","purl":"pkg:golang/github.com/projectcapsule/capsule","source":"GO-2026-5406"}],"prev":{"headline":"DataEase: Authenticated SQL Injection in Chart Quota Filters","id":"CVE-2026-55635"},"products":["capsule"],"published":"2026-09-15","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["projectcapsule"]},"summary":"Attackers with specific RBAC permissions can bypass validation to modify namespace tenant labels due to a typo in webhook configuration.","url":"https://insights.sbomify.com/CVE-2026-55636/"}