JLSEC-2026-662
- Source
- https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-662.md
- Import Source
- https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-662.json
- JSON Data
- https://api.osv.dev/v1/vulns/JLSEC-2026-662
- Upstream
- Published
- 2026-07-11T04:13:36.542Z
- Modified
- 2026-07-25T18:24:44.845011559Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- 8.3 (High) CVSS_V4 - 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a...
- Details
-
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. - Database specific
{ "license": "CC-BY-4.0", "sources": [ { "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58050", "database_specific": { "status": "Analyzed" }, "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-58050", "published": "2026-06-28T02:16:32.017Z", "id": "CVE-2026-58050", "imported": "2026-07-17T22:21:33.501Z", "modified": "2026-06-30T20:27:36.860Z" }, { "html_url": "https://github.com/advisories/GHSA-mf77-5hj2-98w9", "url": "https://api.github.com/advisories/GHSA-mf77-5hj2-98w9", "published": "2026-06-28T03:33:40Z", "id": "GHSA-mf77-5hj2-98w9", "imported": "2026-07-17T22:21:33.704Z", "modified": "2026-06-28T03:33:43Z" }, { "modified": "2026-06-29T12:27:17Z", "id": "EUVD-2026-39970", "published": "2026-06-28T01:32:53Z", "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39970", "imported": "2026-07-17T22:21:43.598Z", "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39970" } ] }- References
-
- https://github.com/advisories/GHSA-mf77-5hj2-98w9
- https://github.com/bikini/exploitarium/tree/main/libssh2-publickey-list-calc-poc
- https://github.com/libssh2/libssh2/blob/master/src/publickey.c
- https://nvd.nist.gov/vuln/detail/CVE-2026-58050
- https://www.vulncheck.com/advisories/libssh2-integer-overflow-in-publickey-subsystem-attribute-allocation