{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-27452 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-27452 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-27452 is a critical vulnerability in JonathanWilbur asn1-ts, published on 21 Feb 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-2026-27452 and fix it if it is affected.\n\nWhat it is: CVE-2026-27452 is a critical vulnerability in JonathanWilbur asn1-ts, published on 21 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-27452 in the wild and no public exploit code.\n\nAffected product: JonathanWilbur asn1-ts. 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-2026-27452/ (Markdown: https://insights.sbomify.com/CVE-2026-27452/index.md)","id":"CVE-2026-27452","markdown":"https://insights.sbomify.com/CVE-2026-27452/index.md","name":"CVE-2026-27452","record":{"aliases":["GHSA-h5rw-vxjr-8q79"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"ASN.1 TypeScript library","requires_auth":"none","summary":"Decoding ASN.1 INTEGERs may leak underlying ArrayBuffer data, exposing sensitive memory contents to attackers.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"asn1-ts","vendor":"jonathanwilbur"}],"cvss":{"score":9.2,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"ASN.1 TypeScript ESM library, including codecs for Basic Encoding Rules (BER) and Distinguished Encoding Rules (DER). In versions 11.0.5 and below, in some cases, decoding an INTEGER could leak the underlying ArrayBuffer. This issue is expected to be fixed in version 11.0.6.","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":"ASN.1 TypeScript Library: Decoding an INTEGER could leak the underlying ArrayBuffer","id":"CVE-2026-27452","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Discourse has check revision visibility on posts endpoint","id":"CVE-2026-27454"},"packages":[],"prev":{"headline":"Umbraco.Engage.Forms Allows Unauthorized Access to Multiple API Endpoints","id":"CVE-2026-27449"},"products":["asn1-ts"],"published":"2026-02-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-24","vendors":["JonathanWilbur"]},"summary":"Decoding ASN.1 INTEGERs may leak underlying ArrayBuffer data, exposing sensitive memory contents to attackers.","url":"https://insights.sbomify.com/CVE-2026-27452/"}