{"answers":{"affected":"8 open source packages ship an affected version, including github.com/sigstore/cosign/v2, cosign and github.com/sigstore/cosign. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-22703 in the wild and no public exploit code.","fix":"Upgrade github.com/sigstore/cosign/v2 to 2.6.2 or later.","what":"CVE-2026-22703 is a medium-severity vulnerability in sigstore cosign, published on 10 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-22703 and fix it if it is affected.\n\nWhat it is: CVE-2026-22703 is a medium-severity vulnerability in sigstore cosign, published on 10 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-22703 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/sigstore/cosign/v2 (Go): affected all versions; fixed in 2.6.2\n- github.com/sigstore/cosign/v2 (Go): affected all versions; fixed in 2.6.2\n- github.com/sigstore/cosign/v2 (Go): affected all versions; fixed in 2.6.2\n- cosign (Bitnami): affected from 2.0.0; fixed in 2.6.2, 3.0.4\n- github.com/sigstore/cosign (Go): affected all versions; no fix listed\n- github.com/sigstore/cosign/v3 (Go): affected all versions; fixed in 3.0.4\n- github.com/sigstore/cosign/v3 (Go): affected all versions; fixed in 3.0.4\n- github.com/sigstore/cosign/v3 (Go): affected all versions; fixed in 3.0.4\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-2026-22703/ (Markdown: https://insights.sbomify.com/CVE-2026-22703/index.md)","id":"CVE-2026-22703","markdown":"https://insights.sbomify.com/CVE-2026-22703/index.md","name":"CVE-2026-22703","record":{"aliases":["BIT-cosign-2026-22703","CLEANSTART-2026-FC01276","CLEANSTART-2026-PA14127","DEBIAN-CVE-2026-22703","GHSA-whqx-f9j3-ch6m","GO-2026-4309","MINI-22wr-52rr-563f","MINI-24wx-jjw8-mv2q","MINI-2prp-cpxp-fcfc","MINI-54f7-3rhh-j28c","MINI-578c-r8gr-rq77","MINI-749p-chhm-74fh","MINI-74mq-6j55-f3qh","MINI-chgw-9r75-rr2c","MINI-fjqr-p9c9-8pwg","MINI-j8q8-3m8x-57rw","MINI-jmw2-cqj6-x737","MINI-jwf8-q9xx-v994","MINI-mvvr-39m2-hcf7","MINI-q2xr-23h5-6gp6","MINI-q8cv-89q6-7xwv","MINI-rx4q-vcqm-hq2g","MINI-wxfg-8q8c-2q85","MINI-xvxg-wv3c-x8rj","UBUNTU-CVE-2026-22703"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Container signing tool","requires_auth":"low_privilege","summary":"Attackers can bypass Cosign verification by crafting bundles with unrelated Rekor entries, preventing audit of signing events.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cosign","vendor":"sigstore"}],"cvss":{"score":5.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"description":"Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When verifying a Rekor entry, Cosign verifies the Rekor entry signature, and also compares the artifact's digest, the user's public key from either a Fulcio certificate or provided by the user, and the artifact signature to the Rekor entry contents. Without these comparisons, Cosign would accept any response from Rekor as valid. A malicious actor that has compromised a user's identity or signing key could construct a valid Cosign bundle by including any arbitrary Rekor entry, thus preventing the user from being able to audit the signing event. This issue has been patched in versions 2.6.2 and 3.0.4.","ecosystems":["Bitnami","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":"Cosign verification accepts any valid Rekor entry under certain conditions","id":"CVE-2026-22703","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":8,"n_references":3,"next":{"headline":"HAXcms Has Stored XSS Vulnerability that May Lead to Account Takeover","id":"CVE-2026-22704"},"packages":[{"ecosystem":"Bitnami","fixed":["2.6.2","3.0.4"],"introduced":["2.0.0","3.0.0"],"last_affected":[],"package":"cosign","purl":"pkg:bitnami/cosign","source":"BIT-cosign-2026-22703"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/sigstore/cosign","purl":"pkg:golang/github.com/sigstore/cosign","source":"GO-2026-4309"},{"ecosystem":"Go","fixed":["2.6.2"],"introduced":["0"],"last_affected":[],"package":"github.com/sigstore/cosign/v2","purl":null,"source":"GHSA-whqx-f9j3-ch6m"},{"ecosystem":"Go","fixed":["2.6.2"],"introduced":["0"],"last_affected":[],"package":"github.com/sigstore/cosign/v2","purl":"pkg:golang/github.com/sigstore/cosign/v2","source":"GHSA-whqx-f9j3-ch6m"},{"ecosystem":"Go","fixed":["2.6.2"],"introduced":["0"],"last_affected":[],"package":"github.com/sigstore/cosign/v2","purl":"pkg:golang/github.com/sigstore/cosign/v2","source":"GO-2026-4309"},{"ecosystem":"Go","fixed":["3.0.4"],"introduced":["0"],"last_affected":[],"package":"github.com/sigstore/cosign/v3","purl":null,"source":"GHSA-whqx-f9j3-ch6m"},{"ecosystem":"Go","fixed":["3.0.4"],"introduced":["0"],"last_affected":[],"package":"github.com/sigstore/cosign/v3","purl":"pkg:golang/github.com/sigstore/cosign/v3","source":"GHSA-whqx-f9j3-ch6m"},{"ecosystem":"Go","fixed":["3.0.4"],"introduced":["0"],"last_affected":[],"package":"github.com/sigstore/cosign/v3","purl":"pkg:golang/github.com/sigstore/cosign/v3","source":"GO-2026-4309"}],"prev":{"headline":"virtualenv Has TOCTOU Vulnerabilities in Directory Creation","id":"CVE-2026-22702"},"products":["cosign"],"published":"2026-01-10","related":[{"cvss_score":7.1,"headline":"False positive signature verification in cosign","id":"CVE-2022-35929","kev_date_added":null,"published":"2022-08-04"},{"cvss_score":5.5,"headline":"Vulnerabilities with blob verification in sigstore cosign","id":"CVE-2022-36056","kev_date_added":null,"published":"2022-09-14"},{"cvss_score":4.3,"headline":"Cosign's verify-blob-attestation reports false positive when payload parsing fails","id":"CVE-2026-39395","kev_date_added":null,"published":"2026-04-07"},{"cvss_score":4.2,"headline":"Cosign vulnerable to system-wide denial of service via malicious attachments","id":"CVE-2024-29902","kev_date_added":null,"published":"2024-04-10"},{"cvss_score":4.2,"headline":"Cosign vulnerable to machine-wide denial of service via malicious artifacts","id":"CVE-2024-29903","kev_date_added":null,"published":"2024-04-10"},{"cvss_score":3.7,"headline":"Cosign Certificate Chain Expiry Validation Issue Allows Issuing Certificate Expiry to Be Overlooked","id":"CVE-2026-24122","kev_date_added":null,"published":"2026-02-19"}],"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-01-12","vendors":["sigstore"]},"summary":"Attackers can bypass Cosign verification by crafting bundles with unrelated Rekor entries, preventing audit of signing events.","url":"https://insights.sbomify.com/CVE-2026-22703/"}