GHSA-565m-g33j-jq96

Source

https://github.com/advisories/GHSA-565m-g33j-jq96

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-565m-g33j-jq96/GHSA-565m-g33j-jq96.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-565m-g33j-jq96

Aliases

CVE-2026-52889

Published

2026-07-06T16:52:16Z

Modified

2026-09-10T03:50:12Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

Formie Hidden field defaults vulnerable to Server-Side Template Injection

Details

Summary

Formie Hidden fields could evaluate request-derived values as Twig during front-end form rendering.

When a Hidden field used a dynamic default value such as HTTP User Agent, Referer URL, Current URL, Query Parameter, or Cookie Value, the value was copied from the incoming request and later passed to Craft’s Twig rendering layer. This allowed an unauthenticated attacker to provide Twig syntax in request-controlled input and have it evaluated server-side when the form was rendered.

Affected Versions

verbb/formie for Craft 5:

Affected: >= 3.0.0-beta.1, <= 3.1.26
Patched: 3.1.27

Impact

An unauthenticated attacker could trigger server-side template evaluation by visiting a public form containing a Hidden field configured with a request-derived default value.

Because Craft’s normal Twig environment exposes application objects, this may lead to disclosure of sensitive information, modification of application state, or remote code execution depending on the site configuration and available Twig capabilities.

Technical Details

The issue exists in the Hidden field front-end render path. Request-derived Hidden field defaults were assigned to the field’s defaultValue, then rendered via Twig in Hidden::getFrontEndInputOptions().

The fix ensures Twig rendering is only performed for the custom default option, where the template source is admin-authored. Request-derived default options are now treated as plain strings.

Patches

Update to Formie 3.1.27 or later.

Workarounds

Until patched, avoid using request-derived Hidden field defaults on public forms, including:

HTTP User Agent
HTTP Refer URL
Current URL
Current URL without Query String
Query Parameter
Cookie Value

Alternatively, remove affected Hidden fields from public forms until the update is applied.

Credit

Name: Yanchon918s Email: ao9s@ao9s.net

Database specific

{
    "cwe_ids":  [
        "CWE-1336"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-06T16:52:16Z",
    "nvd_published_at":  null,
    "severity":  "CRITICAL"
}

References

Affected packages

Packagist / verbb/formie

Package

Name: verbb/formie
Purl: pkg:composer/verbb/formie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

3.1.27

Affected versions

1.*

1.0.0

1.0.1

1.0.2

1.0.3

1.0.4

1.0.5

1.0.6

1.0.7

1.0.8

1.0.9

1.0.9.1

1.1.0

1.1.1

1.1.1.1

1.1.2

1.1.3

1.1.4

1.1.4.1

1.1.5

1.1.6

1.1.7

1.1.8

1.2.0

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

1.2.7

1.2.7.1

1.2.8

1.2.9

1.2.10

1.2.11

1.2.12

1.2.13

1.2.14

1.2.15

1.2.16

1.2.17

1.2.18

1.2.19

1.2.20

1.2.21

1.2.22

1.2.23

1.2.23.1

1.2.24

1.2.25

1.2.26

1.2.27

1.2.28

1.3.0

1.3.1

1.3.2

1.3.3

1.3.4

1.3.5

1.3.6

1.3.7

1.3.8

1.3.9

1.3.10

1.3.11

1.3.12

1.3.13

1.3.14

1.3.15

1.3.16

1.3.16.1

1.3.17

1.3.18

1.3.19

1.3.19.1

1.3.20

1.3.21

1.3.22

1.3.23

1.3.24

1.3.25

1.3.26

1.3.27

1.4.0

1.4.0.1

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.4.6

1.4.7

1.4.8

1.4.9

1.4.10

1.4.11

1.4.12

1.4.13

1.4.14

1.4.15

1.4.16

1.4.17

1.4.18

1.4.19

1.4.20

1.4.21

1.4.21.1

1.4.22

1.4.23

1.4.24

1.4.25

1.4.26

1.4.27

1.4.28

1.5.0

1.5.1

1.5.2

1.5.3

1.5.4

1.5.5

1.5.6

1.5.7

1.5.8

1.5.9

1.5.10

1.5.11

1.5.12

1.5.13

1.5.13.1

1.5.13.2

1.5.14

1.5.15

1.5.16

1.5.17

1.5.18

1.5.19

1.6.0

1.6.1

1.6.2

1.6.3

1.6.4

1.6.5

1.6.6

1.6.7

1.6.8

1.6.9

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

1.6.20

1.6.21

1.6.22

1.6.23

1.6.24

1.6.25

1.6.26

1.6.27

1.6.28

1.6.29

1.6.30

1.6.31

1.6.32

1.6.33

1.6.34

1.6.35

1.6.36

1.6.36.1

1.6.37

1.6.38

1.6.39

1.6.40

1.6.41

1.6.42

1.6.43

1.6.44

1.6.45

1.6.46

1.6.47

2.*

2.0.0-beta.1

2.0.0-beta.2

2.0.0-beta.3

2.0.0-beta.4

2.0.0-beta.5

2.0.0-beta.6

2.0.0-beta.7

2.0.0-beta.8

2.0.0-beta.9

2.0.0-beta.10

2.0.0-beta.11

2.0.0-beta.12

2.0.0-beta.13

2.0.0-beta.14

2.0.0-beta.15

2.0.0-beta.16

2.0.0

2.0.1

2.0.2

2.0.3

2.0.4

2.0.5

2.0.6

2.0.7

2.0.8

2.0.9

2.0.10

2.0.11

2.0.12

2.0.13

2.0.14

2.0.15

2.0.16

2.0.17

2.0.18

2.0.19

2.0.20

2.0.21

2.0.22

2.0.23

2.0.23.1

2.0.24

2.0.25

2.0.25.1

2.0.26

2.0.27

2.0.27.1

2.0.28

2.0.29

2.0.30

2.0.31

2.0.32

2.0.33

2.0.34

2.0.34.1

2.0.35

2.0.36

2.0.37

2.0.38

2.0.39

2.0.40

2.0.41

2.0.42

2.0.43

2.0.44

2.0.44.1

2.0.45

2.1.0

2.1.1

2.1.2

2.1.3

2.1.4

2.1.5

2.1.6

2.1.7

2.1.8

2.1.9

2.1.10

2.1.11

2.1.12

2.1.13

2.1.14

2.1.15

2.1.16

2.1.17

2.1.18

2.1.19

2.1.20

2.1.21

2.1.22

2.1.23

2.1.24

2.1.25

2.1.26

2.1.27

2.1.28

2.1.29

2.1.30

2.1.31

2.1.32

2.1.33

2.1.34

2.1.35

2.1.36

2.1.37

2.1.38

2.1.39

2.1.40

2.1.41

2.1.42

2.1.43

2.1.44

2.1.45

2.1.46

2.1.47

2.1.48

2.1.49

2.1.50

2.1.51

2.1.52

2.2.0

2.2.1

2.2.2

2.2.3

2.2.4

2.2.5

2.2.6

2.2.7

2.2.8

2.2.9

2.2.10

2.2.11

2.2.12

2.2.13

2.2.14

2.2.15

2.2.16

2.2.17

2.2.18

2.2.19

2.2.20

2.2.21

2.2.22

2.2.23

2.2.24

2.2.25

2.2.26

2.2.27

2.2.28

2.2.29

2.2.30

3.*

3.0.0-beta.1

3.0.0-beta.2

3.0.0-beta.3

3.0.0-beta.4

3.0.0-beta.5

3.0.0-beta.6

3.0.0-beta.7

3.0.0-beta.8

3.0.0-beta.9

3.0.0-beta.10

3.0.0-beta.11

3.0.0-beta.12

3.0.0-beta.13

3.0.0-beta.14

3.0.0-beta.15

3.0.0-beta.16

3.0.0-beta.17

3.0.0-beta.18

3.0.0-beta.19

3.0.0-beta.20

3.0.0

3.0.1

3.0.2

3.0.3

3.0.4

3.0.5

3.0.6

3.0.7

3.0.8

3.0.9

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

3.0.20

3.0.21

3.0.22

3.0.23

3.0.24

3.0.25

3.0.26

3.0.27

3.0.28

3.0.29

3.0.30

3.0.31

3.0.32

3.1.0

3.1.1

3.1.2

3.1.3

3.1.4

3.1.5

3.1.6

3.1.7

3.1.8

3.1.9

3.1.10

3.1.11

3.1.12

3.1.13

3.1.14

3.1.15

3.1.16

3.1.17

3.1.18

3.1.19

3.1.20

3.1.21

3.1.22

3.1.23

3.1.24

3.1.25

3.1.26

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-565m-g33j-jq96/GHSA-565m-g33j-jq96.json"