CVE-2026-40496

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Source

https://cve.org/CVERecord?id=CVE-2026-40496

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40496.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-40496

Aliases

GHSA-2783-wxmm-wmwr

Published

2026-04-21T01:38:50.117Z

Modified

2026-07-15T01:48:57.069540628Z

Severity

8.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P CVSS Calculator

Summary

FreeScout has Predictable Attachment Token that Allows Unauthenticated Private File Download via Brute Force

Details

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, attachment download tokens are generated using a weak and predictable formula: md5(APP_KEY + attachment_id + size). Since attachment_id is sequential and size can be brute-forced in a small range, an unauthenticated attacker can forge valid tokens and download any private attachment without credentials. Version 1.8.213 fixes the issue.

Database specific

{
    "cwe_ids": [
        "CWE-330",
        "CWE-340"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40496.json",
    "cna_assigner": "GitHub_M"
}

References

Affected packages

Git / github.com/freescout-help-desk/freescout

Affected ranges

Type

GIT

Repo

https://github.com/freescout-help-desk/freescout

Events

Introduced

Fixed

acf57a7a4b19544641523c6f7e51b1035c03c9b6

Fixed

dbdf8f2260b43a21818255c70f0b61b9de9cd555

Database specific

{
    "cpe": "cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.8.213"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

1.*

1.0.0

1.0.2

1.0.3

1.0.4

1.0.5

1.0.6

1.0.7

1.0.8

1.0.9

1.1.0

1.1.1

1.1.10

1.1.2

1.1.3

1.1.4

1.1.5

1.1.6

1.1.7

1.1.8

1.1.9

1.2.0

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

1.3.0

1.3.1

1.3.10

1.3.11

1.3.12

1.3.13

1.3.14

1.3.15

1.3.16

1.3.17

1.3.18

1.3.19

1.3.2

1.3.3

1.3.4

1.3.5

1.3.6

1.3.7

1.3.8

1.3.9

1.4.0

1.4.1

1.4.10

1.4.11

1.4.12

1.4.2

1.4.3

1.4.4

1.4.6

1.4.7

1.4.8

1.4.9

1.5.0

1.5.1

1.5.10

1.5.11

1.5.12

1.5.13

1.5.14

1.5.15

1.5.2

1.5.3

1.5.4

1.5.5

1.5.6

1.5.7

1.5.8

1.5.9

1.6.0

1.6.1

1.6.10

1.6.11

1.6.12

1.6.13

1.6.14

1.6.15

1.6.16

1.6.17

1.6.18

1.6.19

1.6.2

1.6.20

1.6.3

1.6.4

1.6.5

1.6.6

1.6.7

1.6.8

1.6.9

1.7.0

1.7.1

1.7.10

1.7.11

1.7.12

1.7.13

1.7.14

1.7.15

1.7.16

1.7.17

1.7.18

1.7.19

1.7.2

1.7.20

1.7.21

1.7.22

1.7.23

1.7.24

1.7.25

1.7.26

1.7.27

1.7.28

1.7.29

1.7.3

1.7.30

1.7.4

1.7.5

1.7.6

1.7.7

1.7.9

1.8.0

1.8.1

1.8.10

1.8.100

1.8.101

1.8.102

1.8.103

1.8.104

1.8.105

1.8.106

1.8.107

1.8.108

1.8.109

1.8.11

1.8.110

1.8.111

1.8.112

1.8.113

1.8.114

1.8.115

1.8.116

1.8.117

1.8.118

1.8.119

1.8.12

1.8.120

1.8.121

1.8.122

1.8.123

1.8.124

1.8.125

1.8.126

1.8.127

1.8.128

1.8.129

1.8.13

1.8.130

1.8.131

1.8.132

1.8.133

1.8.134

1.8.135

1.8.136

1.8.137

1.8.138

1.8.139

1.8.14

1.8.140

1.8.141

1.8.142

1.8.143

1.8.144

1.8.145

1.8.146

1.8.147

1.8.148

1.8.149

1.8.15

1.8.150

1.8.151

1.8.152

1.8.153

1.8.154

1.8.155

1.8.156

1.8.157

1.8.158

1.8.159

1.8.16

1.8.160

1.8.161

1.8.162

1.8.163

1.8.164

1.8.165

1.8.166

1.8.167

1.8.168

1.8.169

1.8.17

1.8.170

1.8.171

1.8.172

1.8.173

1.8.174

1.8.175

1.8.176

1.8.177

1.8.178

1.8.179

1.8.18

1.8.180

1.8.181

1.8.182

1.8.183

1.8.184

1.8.185

1.8.186

1.8.187

1.8.188

1.8.189

1.8.19

1.8.190

1.8.191

1.8.192

1.8.193

1.8.194

1.8.195

1.8.196

1.8.197

1.8.198

1.8.199

1.8.2

1.8.20

1.8.200

1.8.201

1.8.202

1.8.203

1.8.204

1.8.205

1.8.206

1.8.207

1.8.208

1.8.209

1.8.21

1.8.210

1.8.211

1.8.212

1.8.22

1.8.23

1.8.24

1.8.25

1.8.26

1.8.27

1.8.28

1.8.29

1.8.3

1.8.30

1.8.31

1.8.32

1.8.33

1.8.34

1.8.35

1.8.36

1.8.37

1.8.38

1.8.39

1.8.4

1.8.40

1.8.41

1.8.42

1.8.43

1.8.44

1.8.45

1.8.46

1.8.47

1.8.48

1.8.49

1.8.5

1.8.50

1.8.51

1.8.52

1.8.53

1.8.54

1.8.55

1.8.56

1.8.57

1.8.58

1.8.59

1.8.6

1.8.60

1.8.61

1.8.62

1.8.63

1.8.65

1.8.66

1.8.67

1.8.68

1.8.69

1.8.7

1.8.70

1.8.71

1.8.72

1.8.73

1.8.74

1.8.75

1.8.76

1.8.77

1.8.78

1.8.79

1.8.8

1.8.80

1.8.81

1.8.82

1.8.83

1.8.84

1.8.85

1.8.86

1.8.87

1.8.88

1.8.89

1.8.9

1.8.90

1.8.91

1.8.92

1.8.93

1.8.94

1.8.95

1.8.96

1.8.97

1.8.98

1.8.99

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40496.json"