{"answers":{"affected":"4 open source packages ship an affected version, including ctutils and cmov. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23519 exists.","fix":"Upgrade ctutils to 0.4.4 or later.","what":"CVE-2026-23519 is a high-severity vulnerability in RustCrypto utils, published on 15 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-23519 and fix it if it is affected.\n\nWhat it is: CVE-2026-23519 is a high-severity vulnerability in RustCrypto utils, published on 15 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23519 exists.\n\nAffected packages and fixed versions:\n- ctutils (crates.io): affected from 0.0.0-0; fixed in 0.4.4\n- cmov (crates.io): affected all versions; fixed in 0.4.4\n- cmov (crates.io): affected all versions; fixed in 0.4.4\n- cmov (crates.io): affected from 0.0.0-0; fixed in 0.4.4\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-2026-23519/ (Markdown: https://insights.sbomify.com/CVE-2026-23519/index.md)","id":"CVE-2026-23519","markdown":"https://insights.sbomify.com/CVE-2026-23519/index.md","name":"CVE-2026-23519","record":{"aliases":["GHSA-2gqc-6j2q-83qp","RUSTSEC-2026-0003","RUSTSEC-2026-0385"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust crypto library","requires_auth":"none","summary":"Attackers can exploit timing side-channels in RustCrypto cmov on Cortex-M0/M1 targets to potentially recover sensitive cryptographic data.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cmov","vendor":"rustcrypto"}],"cvss":{"score":8.9,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-203","name":"Observable Discrepancy"},{"id":"CWE-208","name":"Observable Timing Discrepancy"}],"description":"RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in constant-time and not be rewritten as branches by the compiler. Prior to 0.4.4, the thumbv6m-none-eabi (Cortex M0, M0+ and M1) compiler emits non-constant time assembly when using cmovnz (portable version). This vulnerability is fixed in 0.4.4.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"RustCrypto cmov: thumbv6m-none-eabi compiler emits non-constant time assembly when using cmovnz","id":"CVE-2026-23519","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":4,"n_references":2,"next":{"headline":"Arcane has a Command Injection in Arcane Updater Lifecycle Labels Enables RCE","id":"CVE-2026-23520"},"packages":[{"ecosystem":"crates.io","fixed":["0.4.4"],"introduced":["0"],"last_affected":[],"package":"cmov","purl":null,"source":"GHSA-2gqc-6j2q-83qp"},{"ecosystem":"crates.io","fixed":["0.4.4"],"introduced":["0"],"last_affected":[],"package":"cmov","purl":"pkg:cargo/cmov","source":"GHSA-2gqc-6j2q-83qp"},{"ecosystem":"crates.io","fixed":["0.4.4"],"introduced":["0.0.0-0"],"last_affected":[],"package":"cmov","purl":"pkg:cargo/cmov","source":"RUSTSEC-2026-0003"},{"ecosystem":"crates.io","fixed":["0.4.4"],"introduced":["0.0.0-0"],"last_affected":[],"package":"ctutils","purl":"pkg:cargo/ctutils","source":"RUSTSEC-2026-0385"}],"prev":{"headline":"Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment","id":"CVE-2026-23518"},"products":["utils"],"published":"2026-01-15","related":[{"cvss_score":2,"headline":"RustCrypto Cmov/CmovEq on aarch64 can produce wrong results if high-bits of registers are set","id":"CVE-2026-50185","kev_date_added":null,"published":"2026-07-17"}],"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":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-01-15","vendors":["RustCrypto"]},"summary":"Attackers can exploit timing side-channels in RustCrypto cmov on Cortex-M0/M1 targets to potentially recover sensitive cryptographic data.","url":"https://insights.sbomify.com/CVE-2026-23519/"}