JLSEC-2026-1087
- Source
- https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1087.md
- Import Source
- https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1087.json
- JSON Data
- https://api.osv.dev/v1/vulns/JLSEC-2026-1087
- Upstream
- Published
- 2026-07-31T18:09:08.751Z
- Modified
- 2026-07-31T18:20:51.695941143Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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, fixed in commit a13bb6c, contains a missing bounds check vulnerability...
- Details
-
libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In
libssh2_publickey_list_fetch(), the version 1 response parser reads a server-controlledcomment_lenvalue and advances the parse pointer without verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup path frees an uninitialized pointer from a non-zeroed realloc() region. - Database specific
{ "license": "CC-BY-4.0", "sources": [ { "database_specific": { "status": "Analyzed" }, "modified": "2026-07-30T15:44:38.170Z", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-66034", "published": "2026-07-24T17:17:35.407Z", "id": "CVE-2026-66034", "imported": "2026-07-31T17:07:21.951Z", "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66034" }, { "html_url": "https://github.com/advisories/GHSA-6h6q-9mwg-r6x7", "id": "GHSA-6h6q-9mwg-r6x7", "published": "2026-07-24T18:31:30Z", "url": "https://api.github.com/advisories/GHSA-6h6q-9mwg-r6x7", "imported": "2026-07-31T17:07:27.607Z", "modified": "2026-07-24T18:31:30Z" }, { "modified": "2026-07-28T01:06:26Z", "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-48721", "published": "2026-07-24T16:42:18Z", "id": "EUVD-2026-48721", "imported": "2026-07-31T17:07:23.723Z", "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-48721" } ] }- References
-
- https://github.com/advisories/GHSA-6h6q-9mwg-r6x7
- https://github.com/libssh2/libssh2/commit/a13bb6c773f0d55ad1628cede57e99803cd898d9
- https://github.com/libssh2/libssh2/pull/2202
- https://nvd.nist.gov/vuln/detail/CVE-2026-66034
- https://www.vulncheck.com/advisories/libssh2-heap-out-of-bounds-read-via-publickey-subsystem