What’s Vulnerable › Vulnerabilities

CVE-2026-79992: Emacs: emacs: command injection via crafted filenames in tramp

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-25 · updated 2026-10-19
• Weakness: CWE-78

Description

A flaw was found in Emacs TRAMP. A local attacker could exploit this vulnerability by processing maliciously crafted filenames. This occurs because TRAMP concatenates login arguments without proper sanitization, which are then passed to a local shell. Successful exploitation could lead to arbitrary code execution.

Affected products

• Red Hat Enterprise Linux 10: all versions — fixed in 1:29.4-14.el10_2.3
• Red Hat Enterprise Linux 6: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions — fixed in 1:26.1-15.el8_10.2
• Red Hat Enterprise Linux 9: all versions — fixed in 1:27.2-18.el9_8.2

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 1:29.4-14.el10_2.3; Red Hat Enterprise Linux 8 1:26.1-15.el8_10.2; Red Hat Enterprise Linux 9 1:27.2-18.el9_8.2. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:80506
• https://access.redhat.com/errata/RHSA-2026:80507
• https://access.redhat.com/errata/RHSA-2026:84591
• https://access.redhat.com/security/cve/CVE-2026-79992
• https://bugzilla.redhat.com/show_bug.cgi?id=2523665
• http://www.openwall.com/lists/oss-security/2026/08/26/15
• http://www.openwall.com/lists/oss-security/2026/10/11/1
• http://www.openwall.com/lists/oss-security/2026/10/14/4

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