{"answers":{"affected":"2 open source packages ship an affected version, including sm2. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-22700 exists.","fix":"No fix has been published for CVE-2026-22700 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-22700 is a high-severity denial of service vulnerability in RustCrypto elliptic-curves, published on 10 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-2026-22700 and fix it if it is affected.\n\nWhat it is: CVE-2026-22700 is a high-severity denial of service vulnerability in RustCrypto elliptic-curves, published on 10 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-2026-22700 exists.\n\nAffected packages and fixed versions:\n- sm2 (crates.io): affected from 0.14.0-pre.0 up to 0.14.0-rc.4; no fix listed\n- sm2 (crates.io): affected from 0.14.0-pre.0 up to 0.14.0-rc.4; no fix listed\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-2026-22700/ (Markdown: https://insights.sbomify.com/CVE-2026-22700/index.md)","id":"CVE-2026-22700","markdown":"https://insights.sbomify.com/CVE-2026-22700/index.md","name":"CVE-2026-22700","record":{"aliases":["GHSA-j9xq-69pf-pcm8"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust elliptic curve library","requires_auth":"none","summary":"Attackers can crash applications using RustCrypto's SM2 decryption by sending malformed ciphertext, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"sm2_elliptic_curve","vendor":"rustcrypto"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"RustCrypto: Elliptic Curves is general purpose Elliptic Curve Cryptography (ECC) support, including types and traits for representing various elliptic curve forms, scalars, points, and public/secret keys composed thereof. In versions 0.14.0-pre.0 and 0.14.0-rc.0, a denial-of-service vulnerability exists in the SM2 public-key encryption (PKE) implementation: the decrypt() path performs unchecked slice::split_at operations on input buffers derived from untrusted ciphertext. An attacker can submit short/undersized ciphertext or carefully-crafted DER-encoded structures to trigger bounds-check panics (Rust unwinding) which crash the calling thread or process. This issue has been patched via commit e60e991.","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":false,"headline":"RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE","id":"CVE-2026-22700","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"filelock Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock","id":"CVE-2026-22701"},"packages":[{"ecosystem":"crates.io","fixed":[],"introduced":["0.14.0-pre.0"],"last_affected":["0.14.0-rc.4"],"package":"sm2","purl":null,"source":"GHSA-j9xq-69pf-pcm8"},{"ecosystem":"crates.io","fixed":[],"introduced":["0.14.0-pre.0"],"last_affected":["0.14.0-rc.4"],"package":"sm2","purl":"pkg:cargo/sm2","source":"GHSA-j9xq-69pf-pcm8"}],"prev":{"headline":"RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()","id":"CVE-2026-22699"},"products":["elliptic-curves"],"published":"2026-01-10","related":[{"cvss_score":8.7,"headline":"RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability","id":"CVE-2026-22698","kev_date_added":null,"published":"2026-01-10"},{"cvss_score":7.5,"headline":"RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()","id":"CVE-2026-22699","kev_date_added":null,"published":"2026-01-10"}],"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":"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-01-12","vendors":["RustCrypto"]},"summary":"Attackers can crash applications using RustCrypto's SM2 decryption by sending malformed ciphertext, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-22700/"}