{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2019-20838 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2019-20838 is a high-severity memory corruption vulnerability in Apple Macos, published on 15 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-20838 and fix it if it is affected.\n\nWhat it is: CVE-2019-20838 is a high-severity memory corruption vulnerability in Apple Macos, published on 15 Jun 2020. 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-2019-20838 in the wild and no public exploit code.\n\nAffected product: Apple Macos. 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-2019-20838/ (Markdown: https://insights.sbomify.com/CVE-2019-20838/index.md)","id":"CVE-2019-20838","markdown":"https://insights.sbomify.com/CVE-2019-20838/index.md","name":"CVE-2019-20838","record":{"aliases":["DEBIAN-CVE-2019-20838","GHSA-689f-qv4w-xgqf","JLSEC-2026-176","UBUNTU-CVE-2019-20838"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"PCRE library","requires_auth":"none","summary":"A buffer over-read in the PCRE library's JIT compiler can cause crashes or leak memory when processing specific regex patterns.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"macos","vendor":"apple"},{"product":"pcre","vendor":"pcre"},{"product":"universal_forwarder","vendor":"splunk"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","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-125","name":"Out-of-bounds Read"}],"description":"libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \\X or \\R has more than one fixed quantifier, a related issue to CVE-2019-20454.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Memory corruption in n/a","id":"CVE-2019-20838","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"apple:macos","products":["apple:macos","splunk:universal_forwarder"],"type":"memory_corruption","year":"2019"},"n_packages":0,"n_references":7,"next":{"headline":"Memory corruption in n/a","id":"CVE-2019-20839"},"packages":[],"prev":{"headline":"Security feature bypass in n/a","id":"CVE-2019-20837"},"products":["n/a"],"published":"2020-06-15","related":[{"cvss_score":9.8,"headline":"Apple macOS Improper Authentication","id":"CVE-2026-65400","kev_date_added":"2026-08-18","published":"2026-08-06"},{"cvss_score":10,"headline":"Security feature bypass in macOS","id":"CVE-2024-44146","kev_date_added":null,"published":"2024-09-16"},{"cvss_score":10,"headline":"Security feature bypass in macOS","id":"CVE-2024-44148","kev_date_added":null,"published":"2024-09-16"},{"cvss_score":10,"headline":"Security feature bypass in macOS","id":"CVE-2023-38586","kev_date_added":null,"published":"2023-09-26"},{"cvss_score":10,"headline":"Security feature bypass in macOS","id":"CVE-2023-40455","kev_date_added":null,"published":"2023-09-26"},{"cvss_score":10,"headline":"Other in n/a","id":"CVE-1999-0590","kev_date_added":null,"published":"2000-02-04"},{"cvss_score":9.8,"headline":"Memory corruption in macOS","id":"CVE-2026-84520","kev_date_added":null,"published":"2026-09-14"}],"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":"2026-10-08","vendors":["n/a"]},"summary":"A buffer over-read in the PCRE library's JIT compiler can cause crashes or leak memory when processing specific regex patterns.","url":"https://insights.sbomify.com/CVE-2019-20838/"}