{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47793 exists.","fix":"No fix has been published for CVE-2021-47793 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47793 is a medium-severity denial of service vulnerability in Telegram Desktop, published on 15 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-47793 and fix it if it is affected.\n\nWhat it is: CVE-2021-47793 is a medium-severity denial of service vulnerability in Telegram Desktop, published on 15 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47793 exists.\n\nAffected product: Telegram Desktop. 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-2021-47793/ (Markdown: https://insights.sbomify.com/CVE-2021-47793/index.md)","id":"CVE-2021-47793","markdown":"https://insights.sbomify.com/CVE-2021-47793/index.md","name":"CVE-2021-47793","record":{"aliases":["GHSA-4gqj-v3rw-hwjg"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Telegram Desktop","requires_auth":"none","summary":"Attackers can crash Telegram Desktop by pasting an oversized message payload, causing a denial of service for users.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"telegram_desktop","vendor":"telegram"}],"cvss":{"score":4.6,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload. Attackers can generate a 9 million byte buffer and paste it into the messaging interface to trigger an application crash.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Telegram Desktop 2.9.2 - Denial of Service (PoC)","id":"CVE-2021-47793","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"ZesleCP 3.1.9 - Remote Code Execution (RCE) (Authenticated)","id":"CVE-2021-47794"},"packages":[],"prev":{"headline":"Remote Mouse 4.002 - Unquoted Service Path","id":"CVE-2021-47792"},"products":["Telegram Desktop"],"published":"2026-01-15","related":[{"cvss_score":9.8,"headline":"Information disclosure in n/a","id":"CVE-2018-17613","kev_date_added":null,"published":"2018-09-28"},{"cvss_score":7.8,"headline":"Security feature bypass in n/a","id":"CVE-2020-17448","kev_date_added":null,"published":"2020-08-11"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2018-17231","kev_date_added":null,"published":"2018-09-19"},{"cvss_score":6.5,"headline":"Information disclosure in n/a","id":"CVE-2018-17780","kev_date_added":null,"published":"2018-09-29"},{"cvss_score":2.4,"headline":"Missing authorization in n/a","id":"CVE-2020-25824","kev_date_added":null,"published":"2020-10-14"}],"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-05","vendors":["Telegram"]},"summary":"Attackers can crash Telegram Desktop by pasting an oversized message payload, causing a denial of service for users.","url":"https://insights.sbomify.com/CVE-2021-47793/"}