{"id":"GHSA-pmwq-pjrm-6p5r","aliases":["GO-2026-5547"],"url":"https://o3.security/vulnerability/GHSA-pmwq-pjrm-6p5r","summary":"in-toto-golang and in-toto-python have inconsistent negation behavior","details":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nin-toto-golang and in-toto-python both support glob patterns in artifact rules to indicate the artifacts that a rule applies to. Both support negations in character classes to indicate what should *not* be matched, but they used different operators to indicate the negation. in-toto-python uses `!` while in-toto-golang used `^`. A layout authored with the expectations of one implementation can therefore exhibit different behavior in the other implementation.\n\nThis impacts users in a specific set of circumstances where two different implementations are used to verify the same layout + attestation bundle at different stages of the same pipeline. As a rule of thumb, we advise using a single implementation across all aspects of a pipeline, from layout creation to pipeline execution and verification to prevent this class of bugs.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nin-toto-golang has been updated to use `!` instead of `^` to indicate negation. See https://github.com/in-toto/in-toto-golang/pull/462. This is part of v0.11.0.","published":"2026-05-08T22:24:19Z","modified":"2026-09-10T03:51:06.602952009Z","cvss":{"score":4.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/in-toto/in-toto-golang","fixedVersion":"0.11.0"}],"fix":{"url":"https://github.com/in-toto/in-toto-golang/pull/462","label":"in-toto/in-toto-golang#462"},"references":[{"type":"WEB","url":"https://github.com/in-toto/in-toto-golang/security/advisories/GHSA-pmwq-pjrm-6p5r"},{"type":"WEB","url":"https://github.com/in-toto/in-toto-golang/pull/462"},{"type":"WEB","url":"https://github.com/in-toto/in-toto-golang/commit/36d782ffb2ca3adbffcdce1fd971c23319dd4469"},{"type":"PACKAGE","url":"https://github.com/in-toto/in-toto-golang"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:51:06.602952009Z"}}