{"answers":{"affected":"3 open source packages ship an affected version, including github.com/gotd/td.","exploited":"There is no known exploitation of CVE-2026-54638 in the wild and no public exploit code.","fix":"Upgrade github.com/gotd/td to 0.145.1 or later.","what":"CVE-2026-54638 is a high-severity denial of service vulnerability in gotd td, published on 28 Jul 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-2026-54638 and fix it if it is affected.\n\nWhat it is: CVE-2026-54638 is a high-severity denial of service vulnerability in gotd td, published on 28 Jul 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-2026-54638 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/gotd/td (Go): affected all versions; fixed in 0.145.1\n- github.com/gotd/td (Go): affected all versions; fixed in 0.145.1\n- github.com/gotd/td (Go): affected all versions; fixed in 0.145.1\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-2026-54638/ (Markdown: https://insights.sbomify.com/CVE-2026-54638/index.md)","id":"CVE-2026-54638","markdown":"https://insights.sbomify.com/CVE-2026-54638/index.md","name":"CVE-2026-54638","record":{"aliases":["GHSA-whmm-qj9r-wvr2","GO-2026-6138"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Go Telegram client library","requires_auth":"none","summary":"Remote unauthenticated attackers can cause denial of service in the gotd/td library by triggering excessive memory allocation via crafted MTProto packets.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"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-789","name":"Memory Allocation with Excessive Size Value"},{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"gotd/td is a T Telegram MTProto API client in Go. Prior to 0.145.1, proto.UnencryptedMessage.Decode in proto/unencrypted_message.go read attacker controlled dataLen from an unauthenticated MTProto unencrypted packet and allocated make([]byte, dataLen) before checking the remaining buffer, allowing remote unauthenticated denial of service through excessive memory allocation and CPU or garbage collection pressure. This issue is fixed in version 0.145.1.","ecosystems":["Go"],"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":"td has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode","id":"CVE-2026-54638","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Style Dictionary - Prototype Pollution in convertTokenData utility function","id":"CVE-2026-54639"},"packages":[{"ecosystem":"Go","fixed":["0.145.1"],"introduced":["0"],"last_affected":[],"package":"github.com/gotd/td","purl":null,"source":"GHSA-whmm-qj9r-wvr2"},{"ecosystem":"Go","fixed":["0.145.1"],"introduced":["0"],"last_affected":[],"package":"github.com/gotd/td","purl":"pkg:golang/github.com/gotd/td","source":"GHSA-whmm-qj9r-wvr2"},{"ecosystem":"Go","fixed":["0.145.1"],"introduced":["0"],"last_affected":[],"package":"github.com/gotd/td","purl":"pkg:golang/github.com/gotd/td","source":"GO-2026-6138"}],"prev":{"headline":"Dragonfly scheduler v1 gRPC unauthenticated SSRF via attacker-controlled PeerHost in DownloadTinyFile","id":"CVE-2026-54637"},"products":["td"],"published":"2026-07-28","related":[],"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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"2026-07-29","vendors":["gotd"]},"summary":"Remote unauthenticated attackers can cause denial of service in the gotd/td library by triggering excessive memory allocation via crafted MTProto packets.","url":"https://insights.sbomify.com/CVE-2026-54638/"}