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  4. CVE 2026 59842 libssh libssh information disclosure via short
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Back to active CVEs
Low · CVSS 3.7CVE-2026-59842

Libssh: libssh: information disclosure via short gssapi curve25519 public key

Answer in brief

CVE-2026-59842 records a Low severity (CVSS 3.7) vulnerability in Libssh: libssh: information disclosure via short gssapi curve25519 public key. The current sources do not mark it as known exploited. Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 21, 2026Updated Sep 22, 2026Source checked Oct 3, 2026First seen by HOL Aug 19, 2026Material review Sep 22, 2026
Upstream Advisory

Key facts

Risk
Low · CVSS 3.7
Exploitation
Not marked as known exploited
Affected software
19 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 3.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:libssh:libssh:0.12.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:10.2:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:10.2:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:10.2:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:10.2:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_eus:10.2:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_eus:10.2:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:10.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:10.2:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:10.2:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:10.2:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:10.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:10.2:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:10.2:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:10.2:*:*:*:*:*:*:*Not reportedNot reported

Recommended response

  1. 1Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

  1. Published upstream

    Jul 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 19, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

A flaw was found in libssh. During server-side GSSAPI key exchange, a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation, leading to an out-of-bounds heap read. This could allow a remote unauthenticated attacker to disclose small amounts of server memory.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Oct 3, 2026
References
4 linked sources
Open source record