{"id":"CVE-2026-41253","state":"PUBLISHED","title":"In iTerm2 through 3.6.9, displaying a .txt file can cause code execution via DCS 2000p and OSC 135 data, if the working directory contains a malicious file whose name is valid outp","description":"In iTerm2 through 3.6.9, displaying a .txt file can cause code execution via DCS 2000p and OSC 135 data, if the working directory contains a malicious file whose name is valid output from the conductor encoding path, such as a pathname with an initial ace/c+ substring, aka \"hypothetical in-band signaling abuse.\" This occurs because iTerm2 accepts the SSH conductor protocol from terminal output that does not originate from a legitimate conductor session.","publishedAt":"2026-04-18T05:27:08.202Z","updatedAt":"2026-04-20T15:52:10.357Z","severity":{"score":6.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","source":"mitre"},"assigner":"mitre","products":["iTerm2 iTerm2"],"affected":[{"vendor":"iTerm2","product":"iTerm2","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.6.9","versionType":"semver"}]}],"references":["https://iterm2.com/downloads.html","https://blog.calif.io/p/mad-bugs-even-cat-readmetxt-is-not","https://github.com/gnachman/iTerm2/commit/a9e745993c2e2cbb30b884a16617cd5495899f86","https://news.ycombinator.com/item?id=47809190"],"weaknesses":["CWE-829"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41253.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41253","state":"PUBLISHED","datePublished":"2026-04-18T05:27:08.202Z","dateUpdated":"2026-04-20T15:52:10.357Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-04-18T05:27:07.778Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In iTerm2 through 3.6.9, displaying a .txt file can cause code execution via DCS 2000p and OSC 135 data, if the working directory contains a malicious file whose name is valid output from the conductor encoding path, such as a pathname with an initial ace/c+ substring, aka \"hypothetical in-band signaling abuse.\" This occurs because iTerm2 accepts the SSH conductor protocol from terminal output that does not originate from a legitimate conductor session."}],"affected":[{"vendor":"iTerm2","product":"iTerm2","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.6.9","versionType":"semver"}]}],"references":[{"url":"https://iterm2.com/downloads.html"},{"url":"https://blog.calif.io/p/mad-bugs-even-cat-readmetxt-is-not"},{"url":"https://github.com/gnachman/iTerm2/commit/a9e745993c2e2cbb30b884a16617cd5495899f86"},{"url":"https://news.ycombinator.com/item?id=47809190"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":6.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-829","description":"CWE-829 Inclusion of Functionality from Untrusted Control Sphere","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-04-18T05:32:12.583Z"},"x_generator":{"engine":"CVE-Request-form 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:iterm2:iterm2:*:*:*:*:*:*:*:*","versionEndIncluding":"3.6.9"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-20T15:51:58.997961Z","id":"CVE-2026-41253","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-20T15:52:10.357Z"}}]}}}