CVE-2026-41253

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Summary

CVECVE-2026-41253
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-18 06:16:17 UTC
Updated2026-04-20 19:05:30 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 6.9 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

EPSS: 0.000050000 probability, percentile 0.002710000 (date 2026-04-21)

Problem Types: CWE-829 | CWE-829 CWE-829 Inclusion of Functionality from Untrusted Control Sphere

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.9MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
3.1CNACVSS6.9MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA ITerm2 ITerm2 affected 3.6.9 semver Not specified

References

ReferenceSourceLinkTags
github.com/gnachman/iTerm2/commit/a9e745993c2e2cbb30b884a16617cd5495899f86 [email protected] github.com
iterm2.com/downloads.html [email protected] iterm2.com
blog.calif.io/p/mad-bugs-even-cat-readmetxt-is-not [email protected] blog.calif.io
news.ycombinator.com/item [email protected] news.ycombinator.com
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