# libssh2.

Every CVE that names libssh2 among its affected products, newest first. Vendors and products are as the CNA wrote them.

## Records, newest first

- [libssh2 Heap Buffer Overflow via ETM Cipher Negotiation](https://agentprime.io/advisories/CVE-2026-66035.md)
  `CVE-2026-66035` · CVE record: libssh2 libssh2 · CVSS 7.7 High · Not analysed yet · Published 24 Jul 2026 · Tags: Memory corruption
- [libssh2 Heap Out-of-Bounds Read via publickey subsystem](https://agentprime.io/advisories/CVE-2026-66034.md)
  `CVE-2026-66034` · CVE record: libssh2 libssh2 · CVSS 7.7 High · Not analysed yet · Published 24 Jul 2026 · Tags: Memory corruption
- [libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation](https://agentprime.io/advisories/CVE-2026-66033.md)
  `CVE-2026-66033` · CVE record: libssh2 libssh2 · CVSS 8.7 High · Not analysed yet · Published 24 Jul 2026 · Tags: Memory corruption
- [libssh2 Double-Free Heap Corruption via sftp_open()](https://agentprime.io/advisories/CVE-2026-66032.md)
  `CVE-2026-66032` · CVE record: libssh2 libssh2 · CVSS 8.7 High · Not analysed yet · Published 24 Jul 2026 · Tags: Memory corruption
- [libssh2 - Free of Uninitialized Pointer in publickey List Cleanup](https://agentprime.io/advisories/CVE-2026-58051.md)
  `CVE-2026-58051` · CVE record: libssh2 libssh2 · CVSS 8.3 High · Not analysed yet · Published 28 Jun 2026 · Tags: Memory corruption
- [libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation](https://agentprime.io/advisories/CVE-2026-58050.md)
  `CVE-2026-58050` · CVE record: libssh2 libssh2 · CVSS 8.3 High · Not analysed yet · Published 28 Jun 2026 · Tags: Memory corruption
- [libssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c](https://agentprime.io/advisories/CVE-2025-15661.md)
  `CVE-2025-15661` · CVE record: libssh2 libssh2 · CVSS 8.3 High · Not analysed yet · Published 18 Jun 2026 · Tags: Memory corruption
- [libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c](https://agentprime.io/advisories/CVE-2026-55200.md)
  `CVE-2026-55200` · CVE record: libssh2 libssh2 · CVSS 9.2 Critical · Critical (CVSS 9+) · Not analysed yet · Published 17 Jun 2026 · Tags: Memory corruption
- [libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler](https://agentprime.io/advisories/CVE-2026-55199.md)
  `CVE-2026-55199` · CVE record: libssh2 libssh2 · CVSS 8.2 High · Not analysed yet · Published 17 Jun 2026 · Tags: Denial of service
- [libssh2 userauth.c userauth_password integer overflow](https://agentprime.io/advisories/CVE-2026-7598.md)
  `CVE-2026-7598` · CVE record: libssh2 · CVSS 6.9 Medium · Not analysed yet · Published 1 May 2026 · Tags: Memory corruption, CWE-189
- [Integer overflow in libssh2](https://agentprime.io/advisories/CVE-2019-3856.md)
  `CVE-2019-3856` · CVE record: The libssh2 Project libssh2 · CVSS 7.5 High · Not analysed yet · Published 25 Mar 2019 · Tags: Memory corruption
- [Integer overflow in libssh2](https://agentprime.io/advisories/CVE-2019-3857.md)
  `CVE-2019-3857` · CVE record: The libssh2 Project libssh2 · CVSS 7.5 High · Not analysed yet · Published 25 Mar 2019 · Tags: Memory corruption
- [Out-of-bounds read in libssh2](https://agentprime.io/advisories/CVE-2019-3860.md)
  `CVE-2019-3860` · CVE record: The libssh2 Project libssh2 · CVSS 5.0 Medium · Not analysed yet · Published 25 Mar 2019 · Tags: Memory corruption
- [Out-of-bounds read in libssh2](https://agentprime.io/advisories/CVE-2019-3861.md)
  `CVE-2019-3861` · CVE record: The libssh2 Project libssh2 · CVSS 5.0 Medium · Not analysed yet · Published 25 Mar 2019 · Tags: Memory corruption
- [Integer overflow in libssh2](https://agentprime.io/advisories/CVE-2019-3863.md)
  `CVE-2019-3863` · CVE record: The libssh2 Project libssh2 · CVSS 7.5 High · Not analysed yet · Published 25 Mar 2019 · Tags: Memory corruption
- [Out-of-bounds read in libssh2](https://agentprime.io/advisories/CVE-2019-3858.md)
  `CVE-2019-3858` · CVE record: The libssh2 Project libssh2 · CVSS 5.0 Medium · Not analysed yet · Published 21 Mar 2019 · Tags: Memory corruption
- [Integer overflow in libssh2](https://agentprime.io/advisories/CVE-2019-3855.md)
  `CVE-2019-3855` · CVE record: The libssh2 Project libssh2 · CVSS 7.5 High · Not analysed yet · Published 21 Mar 2019 · Tags: Memory corruption
- [libssh2: An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way…](https://agentprime.io/advisories/CVE-2019-3862.md)
  `CVE-2019-3862` · CVE record: The libssh2 Project libssh2 · CVSS 7.3 High · Not analysed yet · Published 20 Mar 2019 · Tags: CWE-130
- [Out-of-bounds read in libssh2](https://agentprime.io/advisories/CVE-2019-3859.md)
  `CVE-2019-3859` · CVE record: The libssh2 Project libssh2 · CVSS 5.0 Medium · Not analysed yet · Published 20 Mar 2019 · Tags: Memory corruption

## Filters and formats

Filters are query parameters on this URL: `q` (words, as in a web search engine: `"a phrase"`, `OR`, `-word`; an id; a package or product name), `severity` (low, medium, high or critical), `critical=1`, `kev=1`, `ecosystem` (npm, pypi, packagist, go, maven, rubygems, crates, nuget, hex), `kind=package`, `assigner` (a CNA’s short name), `min_score` and `state`. Each record’s title links to its Markdown page.

- The same list as JSON: <https://api.agentprime.io/v1/advisories?technology=libssh2>
- Every list: <https://agentprime.io/advisories.md>, critical: <https://agentprime.io/advisories/critical.md>; by weakness: <https://agentprime.io/advisories/tag/sql-injection.md> and the other tags in <https://agentprime.io/llms.txt>; by technology: `/advisories/technology/<slug>.md` (`fortinet-fortimail`)

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The web page: <https://agentprime.io/advisories/technology/libssh2/>. Everything for agents: <https://agentprime.io/llms.txt>.