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CVE-2026-54162

Ember: Unneutralised terminal escape/control sequences from Caddy logs injected into the operator's TUI

Products / packages alexandre-daubois ember

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 23:55:31 UTC
GitHub_M · CVSS:3.1 · 4.7
Assessment vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Severity

medium4.7

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

Ember, a terminal dashboard for Caddy servers, has a vulnerability in versions prior to 1.4.2 where unauthenticated clients can inject terminal escape sequences into the operator's TUI, potentially allowing monitoring-dashboard spoofing and clipboard hijacking. The issue occurs when viewing the default Logs tab. Consequences depend on the terminal emulator.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

Consequences depend on the terminal emulator and usually require further operator action to escalate; this is not general-purpose remote code execution.

Excerpt from the original source description below.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

alexandre-daubois · GitHub_M

ember

1 range
GitHub_M version evidence

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affected

< 1.4.2

unaffected

unknown

Other versions: unknown

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Ember is a real-time terminal dashboard for Caddy servers with FrankenPHP support. Prior to 1.4.2, interactive TUI row formatters pass Caddy access-log fields, particularly the request URI, through the fitCellLeft render helper without neutralizing terminal escape or control sequences. An unauthenticated remote client can place ANSI, OSC, or CSI control bytes in an ordinary HTTP request target. Caddy JSON-escapes those bytes, ParseLogLine decodes them back into raw controls, and the formatters concatenate them into View() output reaching os.Stdout. When the operator views the default Logs tab, the terminal interprets these sequences, allowing monitoring-dashboard spoofing, clipboard hijacking through OSC 52, and window-title spoofing through OSC 0/2. This works even with a loopback-only log listener because the input arrives through normal Caddy access logs. Certificates and Routes share secondary unneutralized render sinks. The --json, --once, and daemon --expose modes are unaffected because they do not render an interactive terminal. Consequences depend on the terminal emulator and usually require further operator action to escalate; this is not general-purpose remote code execution. This issue is fixed in version 1.4.2.

References

3 sources
alexandre-daubois/ember · security/advisories/GHSA-x3g7-qrwc-f6c5
Security advisoryGitHub_M
alexandre-daubois/ember · commit fcb7160
PatchGitHub_M
alexandre-daubois/ember · releases/tag/v1.4.2
Release notesGitHub_M

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-54162

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-150 ↗

CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences

GitHub_M

Related →
Contributing organizations · 2
GitHub_M

Assigning organization

2026-10-28
CISA-ADP

Additional data publisher

2026-10-29

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-54162

    Observed 2026-10-29T18:49:16.921Z · upstream updated 2026-10-29T18:31:49.122Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-29T18:31:30.695330Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.