CVE-2026-104026

Control Characters in Git Subtree URLs Allow Code Execution

Published Oct 2, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
In Sapling SCM prior to v0.2.20260929-102736, control characters were allowed to be embedded in Git subtree URLs. A maliciously constructed repository, if cloned by a target, could trigger code execution on otherwise read-only actions such as sl log/blame/annotate.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Meta Platforms, Inc
Meta Platforms, Inc sapling Scm
Vendors & Products Meta Platforms, Inc
Meta Platforms, Inc sapling Scm
Type Values Removed Values Added
Title Control Characters in Git Subtree URLs Allow Code Execution
Type Values Removed Values Added
Title Control Characters in Git Subtree URLs Cause Code Execution
Weaknesses CWE-78
Type Values Removed Values Added
Title Control Characters in Git Subtree URLs Cause Code Execution
Weaknesses CWE-78
Type Values Removed Values Added
Weaknesses CWE-150
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description In Sapling SCM prior to v0.2.20260929-102736, control characters were allowed to be embedded in Git subtree URLs. A maliciously constructed repository, if cloned by a target, could trigger code execution on otherwise read-only actions such as sl log/blame/annotate.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Meta
Published
Updated
Oct 2, 2026, 2:30 PM
Reserved
Oct 1, 2026, 5:11 PM
Status
Awaiting Analysis
Published
Oct 2, 2026, 3:17 PM
Modified
Oct 2, 2026, 6:44 PM