CVE-2026-59846
Libssh: libssh: information disclosure via proxycommand %r username expansion
02 Description
Libssh: libssh: information disclosure via proxycommand %r username expansion
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.12% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 1.6% of scored records. A rank, not a probability.
- NVD base score
- 3.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-09-01.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-07-21 12:55Z3 MO AGO
- Last updated
- 2026-09-01 20:21Z1 MO AGO
- Reserved
- 2026-07-07
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Low (CVSS 3.9)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- Weaknesses
- Data version
- 5.2
- Document digest
- 0ac2ef6088c57da7a174c065103c3af99b45acd297febd8ad2636054ec675833
05 Affected products
06 References
- access.redhat.comRHSA-2026:42922https://access.redhat.com/errata/RHSA-2026:42922
- access.redhat.comRHSA-2026:55855https://access.redhat.com/errata/RHSA-2026:55855
- access.redhat.comRHSA-2026:62217https://access.redhat.com/errata/RHSA-2026:62217
- access.redhat.comRHSA-2026:62218https://access.redhat.com/errata/RHSA-2026:62218
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-59846
- bugzilla.redhat.comRHBZ#2498179https://bugzilla.redhat.com/show_bug.cgi?id=2498179
07 Fixed in
AlmaLinux 8
- libssh Fixed in 0.9.6-17.el8_10
- libssh-config Fixed in 0.9.6-17.el8_10
- libssh-devel Fixed in 0.9.6-17.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- libssh Fixed in 0.10.4-19.el9_8
- libssh-config Fixed in 0.10.4-19.el9_8
- libssh-devel Fixed in 0.10.4-19.el9_8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- libssh Fixed in 0.12.0-3.el10_2
- libssh-config Fixed in 0.12.0-3.el10_2
- libssh-devel Fixed in 0.12.0-3.el10_2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- libssh Fixed in 0.9.6-17.el8_10
- libssh-config Fixed in 0.9.6-17.el8_10
- libssh-devel Fixed in 0.9.6-17.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- libssh Fixed in 0.10.4-19.el9_8
- libssh-config Fixed in 0.10.4-19.el9_8
- libssh-devel Fixed in 0.10.4-19.el9_8
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- libssh Fixed in 0.12.0-3.el10_2
- libssh-config Fixed in 0.12.0-3.el10_2
- libssh-devel Fixed in 0.12.0-3.el10_2
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libssh Fixed in 0.10.6-0+deb12u3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libssh Fixed in 0.11.5-0+deb13u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libssh Fixed in 0.12.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- libssh Fixed in 0.9.6-2ubuntu0.22.04.8
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- libssh Fixed in 0.10.6-2ubuntu0.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- libssh Fixed in 0.11.3-1ubuntu2.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- libssh No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- libssh No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- libssh No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.