CVE-2026-105220: klembot twinejs

Twine 2 Desktop through 2.12.0 Arbitrary Code Execution via Imported Story Files

CVSS 8.5 HighEPSS 0.0022 · 11th percentile

Published by the CVE Program (CNA: VulnCheck) at 4 Oct 2026, 22:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
klembot	twinejs	affected 2.12.0 and earlier custom Other versions: unaffected

Identifiers

CVE-2026-105220

CNA

VulnCheck

Weakness (CWE)

CWE-79

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.5	High	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0022, the 11th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 4 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/klembot/twinejs/issues/1706 issue-tracking
github.com/klembot/twinejs product
github.com/klembot/twinejs/blob/2.12.0/src/util/import.ts#L134-L136 technical-description
github.com/klembot/twinejs/blob/2.12.0/src/electron/main-process/scratch-file.ts#L57-L63 technical-description
github.com/klembot/twinejs/commit/8e8a2bef5b1e20c58b99d22a2a4d8d867fb421cb patch
github.com/klembot/twinejs/commit/3a9af28cabe9684730beb8b578132cad9bb5bc60 patch
www.vulncheck.com/advisories/twine-2-desktop-through-2.12.0-arbitrary-code-execution-via-imported-story-files third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.