{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-58050 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-58050 is a high-severity vulnerability in libssh2, published on 28 Jun 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-2026-58050 and fix it if it is affected.\n\nWhat it is: CVE-2026-58050 is a high-severity vulnerability in libssh2, published on 28 Jun 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-2026-58050 in the wild and no public exploit code.\n\nAffected product: libssh2. 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-2026-58050/ (Markdown: https://insights.sbomify.com/CVE-2026-58050/index.md)","id":"CVE-2026-58050","markdown":"https://insights.sbomify.com/CVE-2026-58050/index.md","name":"CVE-2026-58050","record":{"aliases":["ALPINE-CVE-2026-58050","AZL-97407","AZL-97434","BELL-CVE-2026-58050","CLSA-2026-1783634800","CLSA-2026-1783635077","CLSA-2026-1784069784","CLSA-2026-1784069914","CLSA-2026-1784069953","CLSA-2026-1784070060","CLSA-2026-1784282780","CLSA-2026-1785308535","DEBIAN-CVE-2026-58050","GHSA-mf77-5hj2-98w9","JLSEC-2026-662","RHSA-2026:54070","UBUNTU-CVE-2026-58050"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"SSH client library","requires_auth":"none","summary":"A malicious SSH server can trigger an integer overflow in libssh2 clients, leading to a heap buffer overflow and potential code execution.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"libssh2","vendor":"libssh2"}],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client.","ecosystems":["Red Hat:hummingbird:1"],"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":"libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation","id":"CVE-2026-58050","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"libssh2 - Free of Uninitialized Pointer in publickey List Cleanup","id":"CVE-2026-58051"},"packages":[{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.11.1-10.4.hum1"],"introduced":["0"],"last_affected":[],"package":"libssh2","purl":"pkg:rpm/redhat/libssh2","source":"RHSA-2026:54070"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.11.1-10.4.hum1"],"introduced":["0"],"last_affected":[],"package":"libssh2-devel","purl":"pkg:rpm/redhat/libssh2-devel","source":"RHSA-2026:54070"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.11.1-10.4.hum1"],"introduced":["0"],"last_affected":[],"package":"libssh2-docs","purl":"pkg:rpm/redhat/libssh2-docs","source":"RHSA-2026:54070"}],"prev":{"headline":"FFmpeg - Out-of-Bounds Write in RASC Decoder decode_dlta()","id":"CVE-2026-58049"},"products":["libssh2"],"published":"2026-06-28","related":[{"cvss_score":9.2,"headline":"libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c","id":"CVE-2026-55200","kev_date_added":null,"published":"2026-06-17"},{"cvss_score":8.7,"headline":"libssh2 Double-Free Heap Corruption via sftp_open()","id":"CVE-2026-66032","kev_date_added":null,"published":"2026-07-24"},{"cvss_score":8.7,"headline":"libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation","id":"CVE-2026-66033","kev_date_added":null,"published":"2026-07-24"},{"cvss_score":8.3,"headline":"libssh2 - Free of Uninitialized Pointer in publickey List Cleanup","id":"CVE-2026-58051","kev_date_added":null,"published":"2026-06-28"},{"cvss_score":8.3,"headline":"libssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c","id":"CVE-2025-15661","kev_date_added":null,"published":"2026-06-18"},{"cvss_score":8.2,"headline":"libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler","id":"CVE-2026-55199","kev_date_added":null,"published":"2026-06-17"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-29","vendors":["libssh2"]},"summary":"A malicious SSH server can trigger an integer overflow in libssh2 clients, leading to a heap buffer overflow and potential code execution.","url":"https://insights.sbomify.com/CVE-2026-58050/"}