CVE-2026-102601

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Source
https://cve.org/CVERecord?id=CVE-2026-102601
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102601.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-102601
Aliases
Downstream
CLSA (3)
DEBIAN (1)
UBUNTU (1)
Published
2026-09-29T15:26:42Z
Modified
2026-10-21T02:55:09Z
Severity
  • 3.5 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Flysystem: WhitespacePathNormalizer's control-character (CorruptedPathDetected) check is bypassed by malformed UTF-8 in the path, affecting every adapter
Details

Flysystem is an open source file storage library for PHP. Prior to 3.35.3, the default WhitespacePathNormalizer in src/WhitespacePathNormalizer.php used by Filesystem across adapters calls preg_match with the u modifier and treats both false and 0 as falsy. A path containing malformed UTF-8 causes PCRE to return false, so paths that also contain control characters bypass CorruptedPathDetected::forPath() in normalizePath(). Filesystem::write() can store such names and Filesystem::listContents() can return the raw ANSI escape sequences, allowing hidden or spoofed terminal file listings when an administrator displays them. This issue is fixed in version 3.35.3.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-150"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102601.json"
}
References

Affected packages

Git / github.com/thephpleague/flysystem

Affected ranges

Type
GIT
Repo
https://github.com/thephpleague/flysystem
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5fc8404762179ae514678487b23494fd69b2309c
Fixed
ef4a9a557d769b5d472c403125716706a0d9cc77
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "3.35.3"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "ef4a9a557d769b5d472c403125716706a0d9cc77"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "3.35.3",
            "range":  [
                {
                    "fixed":  "5fc8404762179ae514678487b23494fd69b2309c"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

2.*
2.0.0
2.0.0-RC1
2.0.0-alpha.1
2.0.0-alpha.2
2.0.0-alpha.3
2.0.0-alpha.4
2.0.0-beta.1
2.0.0-beta.2
2.0.0-beta.3
2.0.1
2.0.2
2.0.3
2.0.4
2.0.5
2.0.6
2.0.7
2.0.8
2.1.0
2.1.1
2.2.0
2.2.1
2.2.2
2.2.3
2.3.0
2.3.1
2.3.2
2.4.0
3.*
3.0.0
3.0.1
3.0.10
3.0.11
3.0.12
3.0.13
3.0.14
3.0.15
3.0.16
3.0.17
3.0.18
3.0.19
3.0.2
3.0.20
3.0.21
3.0.22
3.0.23
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7
3.0.8
3.0.9
3.1.0
3.1.1
3.10.0
3.10.1
3.10.2
3.10.3
3.10.4
3.11.0
3.12.0
3.12.1
3.12.2
3.12.3
3.13.0
3.14.0
3.15.0
3.15.1
3.16.0
3.17.0
3.18.0
3.19.0
3.2.0
3.2.1
3.20.0
3.22.0
3.23.0
3.23.1
3.24.0
3.25.0
3.25.1
3.26.0
3.27.0
3.28.0
3.29.0
3.29.1
3.3.0
3.30.0
3.30.1
3.30.2
3.31.0
3.32.0
3.33.0
3.34.0
3.35.0
3.35.1
3.35.2
3.4.0
3.5.0
3.5.1
3.5.2
3.6.0
3.7.0
3.8.0
3.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102601.json"