CVE-2026-100909

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-100909
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100909.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-100909
Aliases
Published
2026-09-28T04:30:10Z
Modified
2026-09-29T03:47:25Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
OctoberCMS ResizeImages.php getSourcePathForResize server-side request forgery
Details

A vulnerability was found in OctoberCMS up to 4.1.19/4.2.25/4.3.4. The impacted element is the function getSourcePathForResize of the file modules/system/classes/ResizeImages.php. The manipulation of the argument realSourcePath results in server-side request forgery. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 4.3.5 and 4.4.0 is sufficient to resolve this issue. The patch is identified as 0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58. The affected component should be upgraded.

Database specific 
{
    "cna_assigner":  "VulDB",
    "cwe_ids":  [
        "CWE-918"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100909.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "4.1.1"
                },
                {
                    "last_affected":  "4.1.1"
                },
                {
                    "introduced":  "4.1.2"
                },
                {
                    "last_affected":  "4.1.2"
                },
                {
                    "introduced":  "4.1.3"
                },
                {
                    "last_affected":  "4.1.3"
                },
                {
                    "introduced":  "4.1.6"
                },
                {
                    "last_affected":  "4.1.6"
                },
                {
                    "introduced":  "4.1.10"
                },
                {
                    "last_affected":  "4.1.10"
                },
                {
                    "introduced":  "4.1.11"
                },
                {
                    "last_affected":  "4.1.11"
                },
                {
                    "introduced":  "4.1.12"
                },
                {
                    "last_affected":  "4.1.12"
                },
                {
                    "introduced":  "4.1.13"
                },
                {
                    "last_affected":  "4.1.13"
                },
                {
                    "introduced":  "4.1.14"
                },
                {
                    "last_affected":  "4.1.14"
                },
                {
                    "introduced":  "4.1.15"
                },
                {
                    "last_affected":  "4.1.15"
                },
                {
                    "introduced":  "4.1.16"
                },
                {
                    "last_affected":  "4.1.16"
                },
                {
                    "introduced":  "4.2.1"
                },
                {
                    "last_affected":  "4.2.1"
                },
                {
                    "introduced":  "4.2.2"
                },
                {
                    "last_affected":  "4.2.2"
                },
                {
                    "introduced":  "4.2.3"
                },
                {
                    "last_affected":  "4.2.3"
                },
                {
                    "introduced":  "4.2.6"
                },
                {
                    "last_affected":  "4.2.6"
                },
                {
                    "introduced":  "4.2.7"
                },
                {
                    "last_affected":  "4.2.7"
                },
                {
                    "introduced":  "4.2.8"
                },
                {
                    "last_affected":  "4.2.8"
                },
                {
                    "introduced":  "4.3.3"
                },
                {
                    "last_affected":  "4.3.3"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/octobercms/october

Affected ranges

Type
GIT
Repo
https://github.com/octobercms/october
Events
Introduced
141179aee18ed9f483d675183b51498d882f64a5
Fixed
0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58
Fixed
1024483d1e9ff04bf8b3b1ede7b02db018a385c7
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.1.0"
        },
        {
            "last_affected":  "4.1.0"
        },
        {
            "introduced":  "4.1.4"
        },
        {
            "last_affected":  "4.1.4"
        },
        {
            "introduced":  "4.1.5"
        },
        {
            "last_affected":  "4.1.5"
        },
        {
            "introduced":  "4.1.7"
        },
        {
            "last_affected":  "4.1.7"
        },
        {
            "introduced":  "4.1.8"
        },
        {
            "last_affected":  "4.1.8"
        },
        {
            "introduced":  "4.1.9"
        },
        {
            "last_affected":  "4.1.9"
        },
        {
            "introduced":  "4.1.17"
        },
        {
            "last_affected":  "4.1.17"
        },
        {
            "introduced":  "4.1.18"
        },
        {
            "last_affected":  "4.1.18"
        },
        {
            "introduced":  "4.1.19"
        },
        {
            "last_affected":  "4.1.19"
        },
        {
            "introduced":  "4.2.0"
        },
        {
            "last_affected":  "4.2.0"
        },
        {
            "introduced":  "4.2.4"
        },
        {
            "last_affected":  "4.2.4"
        },
        {
            "introduced":  "4.2.5"
        },
        {
            "last_affected":  "4.2.5"
        },
        {
            "introduced":  "4.2.9"
        },
        {
            "last_affected":  "4.2.9"
        },
        {
            "introduced":  "4.2.10"
        },
        {
            "last_affected":  "4.2.10"
        },
        {
            "introduced":  "4.2.11"
        },
        {
            "last_affected":  "4.2.11"
        },
        {
            "introduced":  "4.2.12"
        },
        {
            "last_affected":  "4.2.12"
        },
        {
            "introduced":  "4.2.13"
        },
        {
            "last_affected":  "4.2.13"
        },
        {
            "introduced":  "4.2.14"
        },
        {
            "last_affected":  "4.2.14"
        },
        {
            "introduced":  "4.2.15"
        },
        {
            "last_affected":  "4.2.15"
        },
        {
            "introduced":  "4.2.16"
        },
        {
            "last_affected":  "4.2.16"
        },
        {
            "introduced":  "4.2.17"
        },
        {
            "last_affected":  "4.2.17"
        },
        {
            "introduced":  "4.2.18"
        },
        {
            "last_affected":  "4.2.18"
        },
        {
            "introduced":  "4.2.19"
        },
        {
            "last_affected":  "4.2.19"
        },
        {
            "introduced":  "4.2.20"
        },
        {
            "last_affected":  "4.2.20"
        },
        {
            "introduced":  "4.2.21"
        },
        {
            "last_affected":  "4.2.21"
        },
        {
            "introduced":  "4.2.22"
        },
        {
            "last_affected":  "4.2.22"
        },
        {
            "introduced":  "4.2.23"
        },
        {
            "last_affected":  "4.2.23"
        },
        {
            "introduced":  "4.2.24"
        },
        {
            "last_affected":  "4.2.24"
        },
        {
            "introduced":  "4.2.25"
        },
        {
            "last_affected":  "4.2.25"
        },
        {
            "introduced":  "4.3.0"
        },
        {
            "last_affected":  "4.3.0"
        },
        {
            "introduced":  "4.3.1"
        },
        {
            "last_affected":  "4.3.1"
        },
        {
            "introduced":  "4.3.2"
        },
        {
            "last_affected":  "4.3.2"
        },
        {
            "introduced":  "4.3.4"
        },
        {
            "last_affected":  "4.3.4"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

4.*
4.1.0
4.1.17
4.1.18
4.1.19
4.1.4
4.1.5
4.1.7
4.1.8
4.1.9
4.2.0
4.2.10
4.2.11
4.2.12
4.2.13
4.2.14
4.2.15
4.2.16
4.2.17
4.2.18
4.2.19
4.2.20
4.2.21
4.2.22
4.2.23
4.2.25
4.2.4
4.2.5
4.2.9
4.3.0
4.3.1
4.3.2
4.3.4
v4.*
v4.1.0
v4.1.17
v4.1.18
v4.1.19
v4.1.4
v4.1.5
v4.1.7
v4.1.8
v4.1.9
v4.2.0
v4.2.10
v4.2.11
v4.2.12
v4.2.13
v4.2.14
v4.2.15
v4.2.16
v4.2.17
v4.2.18
v4.2.19
v4.2.20
v4.2.21
v4.2.22
v4.2.23
v4.2.24
v4.2.25
v4.2.4
v4.2.5
v4.2.9
v4.3.0
v4.3.1
v4.3.2
v4.3.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100909.json"