{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-123559 in the wild and no public exploit code.","exposure":"","fix":"No fix has been published for CVE-2026-123559 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-123559 is a high-severity vulnerability in ZcashFoundation zebra, published on 8 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123559 and fix it if it is affected.\n\nWhat it is: CVE-2026-123559 is a high-severity vulnerability in ZcashFoundation zebra, published on 8 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123559 in the wild and no public exploit code.\n\nAffected product: ZcashFoundation zebra. 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-2026-123559/ (Markdown: https://insights.sbomify.com/CVE-2026-123559/index.md)","id":"CVE-2026-123559","markdown":"https://insights.sbomify.com/CVE-2026-123559/index.md","name":"CVE-2026-123559","record":{"aliases":["GHSA-j4cw-58mj-7w6v","GHSA-wgc2-xcwr-9pcw"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"}],"description":"Zebra before 7.0.0 contains an inefficient algorithmic complexity vulnerability that allows unauthenticated peers to exhaust verification threads by submitting transactions with many transparent inputs. Attackers can relay invalid transactions with tens of thousands of inputs, forcing quadratic ZIP-244 or ZIP-243 digest recomputation that stalls Rayon-backed block verification for minutes.","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":"Zebra before 7.0.0 Denial of Service via Quadratic Sighash Computation","id":"CVE-2026-123559","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Zebra before 7.0.0 Sync Denial of Service via Forged Checkpoint Block Body","id":"CVE-2026-123560"},"nickname":null,"packages":[],"prev":{"headline":"Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind","id":"CVE-2026-123558"},"products":["zebra"],"published":"2026-11-08","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-08","vendors":["ZcashFoundation"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123559/"}