{"answers":{"affected":"6 open source packages ship an affected version, including github.com/kyverno/kyverno and kyverno. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23881 exists.","fix":"Upgrade github.com/kyverno/kyverno to a fixed version for your release line: 1.15.3 or 1.16.3.","what":"CVE-2026-23881 is a high-severity denial of service vulnerability in kyverno, published on 27 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-23881 and fix it if it is affected.\n\nWhat it is: CVE-2026-23881 is a high-severity denial of service vulnerability in kyverno, published on 27 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23881 exists.\n\nAffected packages and fixed versions:\n- github.com/kyverno/kyverno (Go): affected all versions; fixed in 1.15.3, 1.16.3\n- github.com/kyverno/kyverno (Go): affected all versions; fixed in 1.15.3\n- github.com/kyverno/kyverno (Go): affected all versions; fixed in 1.15.3\n- github.com/kyverno/kyverno (Go): affected from 1.16.0-rc.1; fixed in 1.16.3\n- github.com/kyverno/kyverno (Go): affected from 1.16.0-rc.1; fixed in 1.16.3\n- kyverno (Bitnami): affected all versions; fixed in 1.15.3, 1.16.3\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-2026-23881/ (Markdown: https://insights.sbomify.com/CVE-2026-23881/index.md)","id":"CVE-2026-23881","markdown":"https://insights.sbomify.com/CVE-2026-23881/index.md","name":"CVE-2026-23881","record":{"aliases":["BIT-kyverno-2026-23881","CLEANSTART-2026-EE99058","GHSA-r2rj-wwm5-x6mq","GO-2026-4382","MINI-343x-q66f-r7jh","MINI-34qf-6fq6-w5q6","MINI-4xcw-7r24-ffg5","MINI-5f2f-4437-87vq","MINI-7wxp-93x4-296g","MINI-979x-ghp6-2cmh","MINI-9xg9-mv59-hc47","MINI-cx7p-vvcr-q7r5","MINI-jjx7-76j8-258m","MINI-p4rv-3h92-vhv7","MINI-v2jq-v486-4j9c","MINI-wjcq-9qg7-qmcg","MINI-wmwr-392f-v3wp"],"analysis":{"component_type":"cloud_service","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Kubernetes policy engine","requires_auth":"low_privilege","summary":"Attackers with policy creation privileges can cause denial of service in Kyverno by crafting policies that exponentially amplify string data through context variables.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"kyverno","vendor":"kyverno"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Kyverno is a policy engine designed for cloud native platform engineering teams. Versions prior to 1.16.3 and 1.15.3 have unbounded memory consumption in Kyverno's policy engine that allows users with policy creation privileges to cause denial of service by crafting policies that exponentially amplify string data through context variables. Versions 1.16.3 and 1.15.3 contain a patch for the vulnerability.","ecosystems":["Bitnami","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":"Kyverno Denial of Service via Context Variable Amplification in Policy Engine","id":"CVE-2026-23881","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":6,"n_references":3,"next":{"headline":"Blinko: Admin RCE - MCP Server Command Injection","id":"CVE-2026-23882"},"packages":[{"ecosystem":"Bitnami","fixed":["1.15.3","1.16.3"],"introduced":["0","1.16.0"],"last_affected":[],"package":"kyverno","purl":"pkg:bitnami/kyverno","source":"BIT-kyverno-2026-23881"},{"ecosystem":"Go","fixed":["1.15.3","1.16.3"],"introduced":["0","1.16.0-rc.1"],"last_affected":[],"package":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","source":"GO-2026-4382"},{"ecosystem":"Go","fixed":["1.15.3"],"introduced":["0"],"last_affected":[],"package":"github.com/kyverno/kyverno","purl":null,"source":"GHSA-r2rj-wwm5-x6mq"},{"ecosystem":"Go","fixed":["1.15.3"],"introduced":["0"],"last_affected":[],"package":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","source":"GHSA-r2rj-wwm5-x6mq"},{"ecosystem":"Go","fixed":["1.16.3"],"introduced":["1.16.0-rc.1"],"last_affected":[],"package":"github.com/kyverno/kyverno","purl":null,"source":"GHSA-r2rj-wwm5-x6mq"},{"ecosystem":"Go","fixed":["1.16.3"],"introduced":["1.16.0-rc.1"],"last_affected":[],"package":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","source":"GHSA-r2rj-wwm5-x6mq"}],"prev":{"headline":"OnboardLite has stored Cross-site Scripting issue that may lead to admin Account Take Over","id":"CVE-2026-23880"},"products":["kyverno"],"published":"2026-01-27","related":[{"cvss_score":10,"headline":"Kyverno Cross-Namespace Privilege Escalation via Policy apiCall","id":"CVE-2026-22039","kev_date_added":null,"published":"2026-01-27"},{"cvss_score":9.8,"headline":"CVE-2026-4789","id":"CVE-2026-4789","kev_date_added":null,"published":"2026-03-30"},{"cvss_score":8.6,"headline":"Kyverno vulnerable to bypass of policy rules that use namespace selectors in match statements","id":"CVE-2025-46342","kev_date_added":null,"published":"2025-04-30"},{"cvss_score":8.1,"headline":"Kyverno: ServiceAccount token leaked to external servers via apiCall service URL","id":"CVE-2026-41323","kev_date_added":null,"published":"2026-04-24"},{"cvss_score":8.1,"headline":"kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token","id":"CVE-2026-40868","kev_date_added":null,"published":"2026-04-21"},{"cvss_score":8.1,"headline":"kyverno verifyImages rule bypass possible with malicious proxy/registry","id":"CVE-2022-47633","kev_date_added":null,"published":"2022-12-23"},{"cvss_score":7.7,"headline":"Kyverno: Cross-Namespace Read Bypasses RBAC Isolation (CVE-2026-22039 Incomplete Fix)","id":"CVE-2026-41068","kev_date_added":null,"published":"2026-04-24"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"US public information, NVD API terms","name":"NVD"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-01-27","vendors":["kyverno"]},"summary":"Attackers with policy creation privileges can cause denial of service in Kyverno by crafting policies that exponentially amplify string data through context variables.","url":"https://insights.sbomify.com/CVE-2026-23881/"}