{"answers":{"affected":"3 open source packages ship an affected version, including github.com/sigstore/gitsign.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44310 exists.","fix":"Upgrade github.com/sigstore/gitsign to 0.15.0 or later.","what":"CVE-2026-44310 is a medium-severity vulnerability in sigstore gitsign, published on 15 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-44310 and fix it if it is affected.\n\nWhat it is: CVE-2026-44310 is a medium-severity vulnerability in sigstore gitsign, published on 15 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44310 exists.\n\nAffected packages and fixed versions:\n- github.com/sigstore/gitsign (Go): affected from 0.4.0; fixed in 0.15.0\n- github.com/sigstore/gitsign (Go): affected from 0.4.0; fixed in 0.15.0\n- github.com/sigstore/gitsign (Go): affected from 0.4.0; fixed in 0.15.0\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-2026-44310/ (Markdown: https://insights.sbomify.com/CVE-2026-44310/index.md)","id":"CVE-2026-44310","markdown":"https://insights.sbomify.com/CVE-2026-44310/index.md","name":"CVE-2026-44310","record":{"aliases":["DEBIAN-CVE-2026-44310","GHSA-7c37-gx6w-8vc5","GO-2026-5212","UBUNTU-CVE-2026-44310"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Git signing tool","requires_auth":"none","summary":"Attackers can bypass Git commit signature verification by crafting empty-certificate PKCS7 messages, causing the tool to exit successfully despite invalid signatures.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-390","name":"Detection of Error Condition Without Action"},{"id":"CWE-129","name":"Improper Validation of Array Index"}],"description":"Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. From 0.4.0 to before 0.15.0, CertVerifier.Verify() in pkg/git/verifier.go unconditionally dereferences certs[0] after sd.GetCertificates() without checking the slice length. A CMS/PKCS7 signed message with an empty certificate set is a structurally valid DER payload; GetCertificates() returns an empty slice with no error, causing an immediate index-out-of-range panic. On the gitsign --verify code path (the GPG-compatible mode invoked by git verify-commit), the panic is silently recovered by internal/io/streams.go's Wrap() function, which returns nil instead of an error. main.go then exits with code 0, causing exit-code-only verification callers to interpret the failed verification as success. This vulnerability is fixed in 0.15.0.","ecosystems":["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":"gitsign --verify panics on empty-certificate PKCS7 and exits 0, bypassing exit-code callers","id":"CVE-2026-44310","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Fabric.js: Improper escaping in fabric.Gradient colorStops leads to XSS in SVG serialization","id":"CVE-2026-44311"},"packages":[{"ecosystem":"Go","fixed":["0.15.0"],"introduced":["0.4.0"],"last_affected":[],"package":"github.com/sigstore/gitsign","purl":null,"source":"GHSA-7c37-gx6w-8vc5"},{"ecosystem":"Go","fixed":["0.15.0"],"introduced":["0.4.0"],"last_affected":[],"package":"github.com/sigstore/gitsign","purl":"pkg:golang/github.com/sigstore/gitsign","source":"GHSA-7c37-gx6w-8vc5"},{"ecosystem":"Go","fixed":["0.15.0"],"introduced":["0.4.0"],"last_affected":[],"package":"github.com/sigstore/gitsign","purl":"pkg:golang/github.com/sigstore/gitsign","source":"GO-2026-5212"}],"prev":{"headline":"gitsign verify accepts signatures over go-git-normalized bytes, enabling trust confusion on malformed commits","id":"CVE-2026-44309"},"products":["gitsign"],"published":"2026-05-15","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-15","vendors":["sigstore"]},"summary":"Attackers can bypass Git commit signature verification by crafting empty-certificate PKCS7 messages, causing the tool to exit successfully despite invalid signatures.","url":"https://insights.sbomify.com/CVE-2026-44310/"}