{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-91189 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-91189 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-91189 is a high-severity vulnerability in Eclipse ThreadX - GUIX, published on 20 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-91189 and fix it if it is affected.\n\nWhat it is: CVE-2026-91189 is a high-severity vulnerability in Eclipse ThreadX - GUIX, published on 20 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-91189 in the wild and no public exploit code.\n\nAffected product: Eclipse ThreadX - GUIX. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-91189/ (Markdown: https://insights.sbomify.com/CVE-2026-91189/index.md)","id":"CVE-2026-91189","markdown":"https://insights.sbomify.com/CVE-2026-91189/index.md","name":"CVE-2026-91189","record":{"aliases":["GHSA-hgcj-22cg-4hfv"],"analysis":null,"analysis_generated_by":null,"assigner":"eclipse","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-680","name":"Integer Overflow to Buffer Overflow"},{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"The GUIX binary resource loader never checks that a font page's glyph range is well formed. `gx_page_header_first_glyph` and `gx_page_header_last_glyph` are read verbatim from the file and only the upper bound of `last_glyph` is validated, so a page declaring `first_glyph \u003e last_glyph` makes `last - first + 1` underflow to a very large unsigned count.\n\nThat count is multiplied by a glyph record size to reserve the load buffer, and the multiply is unchecked, so it wraps to a small value and the loader allocates a buffer far smaller than the data it is about to write. The load pass then recomputes the count in a narrower type and writes attacker-controlled glyph records into the undersized buffer.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"The GUIX binary resource loader never checks that a font page's glyph range is well formed.","id":"CVE-2026-91189","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Lantronix G520 Series Cellular Gateway Improper Verification of Cryptographic Signature","id":"CVE-2026-91191"},"packages":[],"prev":{"headline":"Improper Verification of Cryptographic Signature in dashbit nimble_zta Cloudflare strategy","id":"CVE-2026-91187"},"products":["Eclipse ThreadX - GUIX"],"published":"2026-10-20","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"total"},"state":"PUBLISHED","updated":"2026-10-20","vendors":["Eclipse Foundation"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-91189/"}