- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.21% · 11th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 5/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
ComfyUI-Easy-Use, a custom node add-on for ComfyUI, contains a path traversal flaw that lets an unauthenticated remote attacker overwrite an installed custom node's Python file with their own code. When ComfyUI restarts and loads that node, the attacker's code runs with the privileges of the ComfyUI process.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
ComfyUI-Easy-Use version 1.3.6 contains a path traversal vulnerability in the save_preview() handler for POST /easyuse/save/{name}. The handler checks the source directory before appending a user-supplied filename and allows the request to select the custom_nodes directory as a copy destination. An unauthenticated attacker who can reach the ComfyUI server can overwrite an installed custom node’s Python entry point with an uploaded file. When ComfyUI restarts and loads the modified node, the attacker’s code runs with the privileges of the ComfyUI process.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure?/25Unknown. No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity?/10Unknown. No CVSS score or vendor rating
- No patch5/5No patch listed yet
What would change the score
- Would score about 60 if added to CISA KEV
- Would score about 55 if CISA's SSVC rates exploitation active
- Would score about 27 if advisories confirm default setups are exposed
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-123790 (Unauthenticated Path Traversal in ComfyUI-Easy-Use Allows Remote Code Execution), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-123790 (entry last updated 2026-11-12):
Affected:
- ComfyUI-Easy-Use ComfyUI-Easy-Use: from 1.3.6, through 1.4.1
Fixed versions: none listed yet.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-123790 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-123790 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/yolain/ComfyUI-Easy-Use
- https://blog.nhhoang.io.vn/posts/2026/11/cve-2026-123790-comfyui-easy-use-save-preview-rce/
- https://github.com/yolain/ComfyUI-Easy-Use/commit/8a0f2fc412c1c6f9109e9392064800a87a706775
- https://www.kb.cert.org/vuls/id/944667
- https://blog.nhhoang.io.vn
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-123790
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-123790"}.Timeline
- CVE published
- First seen by cve.now
- Record last updated
Affected versions
- ComfyUI-Easy-Use ComfyUI-Easy-Use
From 1.3.6 · through 1.4.1
Evidence 7
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-123790
Is CVE-2026-123790 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-123790?
ComfyUI-Easy-Use: from 1.3.6 through 1.4.1.Source: cve.now feed data