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high · CVSS 7.8

CVE-2026-79992

Emacs: emacs: command injection via crafted filenames in tramp

Published 25 Aug 2026 · Source updated 4 Nov 2026 · Retrieved 2026-11-06 03:37 UTC

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What happened?

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.

Description supplied by CVE Program. Formatting is simplified; follow the original advisory for full details.

Affected software and versions

Source-provided software and version information
SoftwareVersion informationFixed version
emacsRed Hatunaffected: 1:29.4-14.el10_2.3 to < *See vendor advisory
emacsRed Hatunaffected: 1:26.1-15.el8_10.2 to < *See vendor advisory
emacsRed Hatunaffected: 1:26.1-15.el8_10.2 to < *See vendor advisory
emacsRed Hatunaffected: 1:27.2-18.el9_8.2 to < *See vendor advisory
emacsRed HatDefault status: affectedSee vendor advisory
emacsRed HatDefault status: affectedSee vendor advisory

Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.

Is it being exploited?

This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.

CISA data retrieved 2026-11-06 16:38 UTC. Check CISA ↗

How to respond

  1. Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
  2. Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
  3. Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.

Sources and remediation references

This public advisory does not determine whether a particular server is affected. Records are refreshed as sources change; verify urgent decisions against the original advisory.

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