{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-1855 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-1855 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-1855 is a medium-severity server-side request forgery vulnerability in Apple Macos, published on 8 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-1855 and fix it if it is affected.\n\nWhat it is: CVE-2021-1855 is a medium-severity server-side request forgery vulnerability in Apple Macos, published on 8 Sep 2021. 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-2021-1855 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-2021-1855/ (Markdown: https://insights.sbomify.com/CVE-2021-1855/index.md)","id":"CVE-2021-1855","markdown":"https://insights.sbomify.com/CVE-2021-1855/index.md","name":"CVE-2021-1855","record":{"aliases":["GHSA-x2pr-2f5w-h2hj"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"macOS","requires_auth":"none","summary":"A malicious website can force unnecessary network connections to fetch its favicon, potentially exposing internal network details.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apple","cpe":[{"product":"macos","vendor":"apple"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[],"description":"A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to force unnecessary network connections to fetch its favicon.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Server-side request forgery in macOS","id":"CVE-2021-1855","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"apple:macos","products":["apple:macos"],"type":"ssrf","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in iCloud for Windows","id":"CVE-2021-1857"},"packages":[],"prev":{"headline":"Security feature bypass in iOS and iPadOS","id":"CVE-2021-1854"},"products":["macOS"],"published":"2021-09-08","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["Apple"]},"summary":"A malicious website can force unnecessary network connections to fetch its favicon, potentially exposing internal network details.","url":"https://insights.sbomify.com/CVE-2021-1855/"}