poco-ai poco-agent Claude File workspace.py WorkspaceManager._setup_session_persistence cleanup

published 2026-08-06 3 mo ago modified 2026-10-23 16 d ago also EUVD-2026-53818

cvss: 4.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits: 0; none known

A security flaw has been discovered in poco-ai poco-agent up to 0.5.4. Affected is the function WorkspaceManager._setup_session_persistence of the file executor/app/core/workspace.py of the component Claude File Handler. The manipulation results in incomplete cleanup. The attack may be performed from remote. Attacks of this nature are highly complex. The exploitability is told to be difficult. The exploit has been released to the public and may be used for attacks.

Patch / fix

links 1

github.com/poco-ai/poco-claw#132 pull request

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 3 mo ago (2026-08-06)

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/poco-ai/poco-claw/pull/132 referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/poco-ai/poco-claw/issues/131 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.3	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	4.8	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	4.0	AV:N/AC:H/Au:N/C:N/I:P/A:P/E:POC/RL:ND/RC:C
CNA	4.0	2.9	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
CNA	2.0	4.0	AV:N/AC:H/Au:N/C:N/I:P/A:P

Affected products

poco-ai poco-agent

Classification

Weakness

CWE-459 Incomplete Cleanup

References

github.com /poco-ai/poco-claw/pull/132
exploit, issue-tracking, patch
github.com /poco-ai/poco-claw/issues/131
exploit, issue-tracking
vuldb.com /vuln/386419
vdb-entry, technical-description
vuldb.com /vuln/386419/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-19019
third-party-advisory
vuldb.com /submit/862681
third-party-advisory

Sources

CVE List CVE-2026-19019
NVD CVE-2026-19019

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary