{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2026-63077 in the wild since at least 5 Aug 2026, including in ransomware campaigns.","fix":"No fix has been published for CVE-2026-63077 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 8 Aug 2026.","what":"CVE-2026-63077 is a critical unsafe deserialization vulnerability in Jetbrains Teamcity, published on 27 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-2026-63077 and fix it if it is affected.\n\nWhat it is: CVE-2026-63077 is a critical unsafe deserialization vulnerability in Jetbrains Teamcity, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2026-63077 in the wild since at least 5 Aug 2026, including in ransomware campaigns.\n\nAffected product: Jetbrains Teamcity. 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-2026-63077/ (Markdown: https://insights.sbomify.com/CVE-2026-63077/index.md)","id":"CVE-2026-63077","markdown":"https://insights.sbomify.com/CVE-2026-63077/index.md","name":"CVE-2026-63077","record":{"aliases":["GHSA-94gx-v738-fx9w"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"CI/CD server","requires_auth":"none","summary":"Unauthenticated attackers can achieve remote code execution on JetBrains TeamCity servers via the agent polling protocol.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"JetBrains","cpe":[{"product":"teamcity","vendor":"jetbrains"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-07-27","github_poc":7,"max_poc_stars":20,"metasploit":1,"nuclei":1,"refs":[{"date":"2026-08-07T08:38:01Z","kind":"github_poc","ref":"https://github.com/sfewer-r7/CVE-2026-63077","stars":20,"title":"Unauthenticated Remote Code Execution in JetBrains TeamCity (CVE-2026-63077)"},{"date":"2026-07-27","kind":"metasploit","ref":"exploit/multi/http/jetbrains_teamcity_rce_cve_2026_63077","stars":null,"title":"JetBrains TeamCity Agent Polling Unauthenticated Remote Code Execution"},{"date":"2026-07-30T20:12:13Z","kind":"github_poc","ref":"https://github.com/unveiledhistory49/teamcity-cve-2026-63077-remediation","stars":0,"title":"JetBrains TeamCity On-Premises CVE-2026-63077 Emergency Hardening \u0026 Patch Runbook Package"},{"date":"2026-08-08T00:10:31Z","kind":"github_poc","ref":"https://github.com/BoredHackerBlog/teamcity-CVE-2026-63077-pcap","stars":0,"title":"teamcity teamcity-CVE-2026-63077 exploitation pcap"},{"date":"2026-08-08T06:32:09Z","kind":"github_poc","ref":"https://github.com/AnggaTechI/CVE-2026-63077","stars":0,"title":"CVE-2026-63077 — Unauthenticated Remote Code Execution in JetBrains TeamCity via agent polling protocol deserialization. CVSS 9.8 CRITICAL. Mass exploitation tool with interactive shell, multi-threading, and real-time result logging."},{"date":"2026-08-19T06:34:00Z","kind":"github_poc","ref":"https://github.com/bakos-sandor-nx/teamcity-cve-2026-63077-remediation","stars":0,"title":"JetBrains TeamCity On-Premises CVE-2026-63077 Emergency Hardening \u0026 Patch Runbook Package"},{"date":"2026-09-04T13:32:31Z","kind":"github_poc","ref":"https://github.com/0xCyp1337/CVE-2026-63077","stars":0,"title":"CVE-2026-63077 - Unauthenticated RCE exploit for JetBrains TeamCity via Agent Polling Deserialization. Supports mass scanning, multi-threading, and interactive shell. For authorized security testing only."},{"date":"2026-10-22T11:59:06Z","kind":"github_poc","ref":"https://github.com/basesixtythree/B63-POC-CVE-2026-63077","stars":0,"title":"PoC and verification material for CVE-2026-63077 (JetBrains TeamCity agent-polling deserialization RCE)"}],"tier":"exploited"},"has_fix":null,"headline":"JetBrains TeamCity Deserialization of Untrusted Data","id":"CVE-2026-63077","indexable":true,"kev":{"dateAdded":"2026-08-05","dueDate":"2026-08-08","knownRansomwareCampaignUse":"Known","product":"TeamCity","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","vendorProject":"JetBrains","vulnerabilityName":"JetBrains TeamCity Deserialization of Untrusted Data Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"jetbrains:teamcity","products":["jetbrains:teamcity"],"type":"deserialization","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Aptabase SQL Injection via ClickHouse query backend","id":"CVE-2026-63080"},"packages":[],"prev":{"headline":"Invalid Pointer Dereference in CMP Server via Crafted protectionAlg","id":"CVE-2026-63076"},"products":["TeamCity"],"published":"2026-07-27","related":[{"cvss_score":9.8,"headline":"JetBrains TeamCity Authentication Bypass","id":"CVE-2024-27198","kev_date_added":"2024-03-07","published":"2024-03-04"},{"cvss_score":9.8,"headline":"JetBrains TeamCity Authentication Bypass","id":"CVE-2023-42793","kev_date_added":"2023-10-04","published":"2023-09-19"},{"cvss_score":7.3,"headline":"JetBrains TeamCity Relative Path Traversal","id":"CVE-2024-27199","kev_date_added":"2026-04-20","published":"2024-03-04"},{"cvss_score":9.8,"headline":"Auth bypass in TeamCity","id":"CVE-2024-23917","kev_date_added":null,"published":"2024-02-06"},{"cvss_score":9.8,"headline":"Auth bypass in n/a","id":"CVE-2022-24331","kev_date_added":null,"published":"2022-02-25"},{"cvss_score":9.8,"headline":"XML external entity in n/a","id":"CVE-2022-24340","kev_date_added":null,"published":"2022-02-25"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-23","vendors":["JetBrains"]},"summary":"Unauthenticated attackers can achieve remote code execution on JetBrains TeamCity servers via the agent polling protocol.","url":"https://insights.sbomify.com/CVE-2026-63077/"}