GHSA-wg4w-wr5q-6vjc: pheditor/pheditor (CVE-2026-55578)

Pheditor: Incomplete command sanitization in terminal feature allows RCE via pipe operator, backtick substitution, and newline injection

CVSS 8.8 HighEPSS 0.0067 · 52nd percentile

Published by the GitHub Advisory Database at 16 Jul 2026, 20:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
pheditor/pheditor	Packagist	>=2.0.1, <2.0.6	2.0.6

Identifiers

GHSA-wg4w-wr5q-6vjc · CVE-2026-55578 · PKSA-c2s6-j4sd-8g42

Weakness (CWE)

CWE-78

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Pheditor versions 2.0.1 up to but not including 2.0.6 are affected. An authenticated user with the terminal permission, which is enabled by default, can bypass the command allowlist using a single pipe, backticks, or a newline in the submitted command, and run arbitrary OS commands as the web server user. Upgrade to version 2.0.6, which is the fixed release.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0067, the 52nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:24 UTC First seen by agentprime
31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.