CVE-2026-75834

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-75834

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75834.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-75834

Aliases

GHSA-q2j8-x8hf-63ch

Published

2026-08-18T11:19:45Z

Modified

2026-10-28T02:30:41Z

Severity

5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator

Summary

Grav before 2.0.14 Stored XSS via Invalid UTF-8 Byte

Details

Grav before 2.0.14 contains a stored cross-site scripting vulnerability in the Security::detectXss() function (system/src/Grav/Common/Security.php). All XSS detection patterns use the PCRE /u (UTF-8) modifier, so a single invalid UTF-8 byte anywhere in page content causes preg_match() to return false for every pattern, silently bypassing the save-time XSS safety gate (Validation::checkSafety()). An authenticated attacker with page-edit permissions (without the security.xss_whitelist privilege) can store malicious JavaScript that executes in the browser of a visitor who views the affected page.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75834.json"
}

References

Affected packages

Git / github.com/getgrav/grav

Affected ranges

Type

GIT

Repo

https://github.com/getgrav/grav

Events

Introduced

Fixed

5192316f5bf0f033636f43561829d7fc13a4ab64

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.0.14"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.0.14"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

0.*

0.8.0

0.9.0

0.9.10

0.9.11

0.9.12

0.9.13

0.9.14

0.9.15

0.9.16

0.9.17

0.9.18

0.9.19

0.9.2

0.9.3

0.9.4

0.9.5

0.9.6

0.9.7

0.9.8

0.9.9

1.*

1.1.0-beta.1

1.1.0-beta.2

1.1.0-beta.3

1.1.0-beta.4

1.1.0-beta.5

1.1.0-rc.1

1.1.0-rc.2

1.1.0-rc.3

1.1.9-rc.1

1.1.9-rc.2

1.1.9-rc.3

1.2.0-rc.1

1.2.0-rc.2

1.2.0-rc.3

1.3.0-rc.1

1.3.0-rc.3

1.3.0-rc.4

1.3.0-rc.5

1.5.0-beta.1

1.5.0-beta.2

1.5.0-rc.1

1.6.0-beta.1

1.6.0-beta.2

1.6.0-beta.5

1.6.0-beta.6

1.6.0-beta.7

1.6.0-beta.8

1.6.0-rc.1

1.6.0-rc.2

1.6.0-rc.3

1.6.0-rc.4

1.7.0

1.7.0-beta.1

1.7.0-beta.10

1.7.0-beta.2

1.7.0-beta.3

1.7.0-beta.4

1.7.0-beta.5

1.7.0-beta.6

1.7.0-beta.7

1.7.0-beta.8

1.7.0-beta.9

1.7.0-rc.1

1.7.0-rc.10

1.7.0-rc.12

1.7.0-rc.13

1.7.0-rc.14

1.7.0-rc.15

1.7.0-rc.17

1.7.0-rc.18

1.7.0-rc.19

1.7.0-rc.2

1.7.0-rc.20

1.7.0-rc.3

1.7.0-rc.4

1.7.0-rc.5

1.7.0-rc.6

1.7.0-rc.7

1.7.0-rc.8

1.7.0-rc.9

1.7.1

1.7.10

1.7.12

1.7.13

1.7.14

1.7.15

1.7.16

1.7.17

1.7.18

1.7.19

1.7.20

1.7.21

1.7.22

1.7.23

1.7.24

1.7.25

1.7.26

1.7.26.1

1.7.27

1.7.27.1

1.7.28

1.7.29

1.7.29.1

1.7.3

1.7.30

1.7.31

1.7.32

1.7.33

1.7.34

1.7.35

1.7.36

1.7.37

1.7.37.1

1.7.38

1.7.39

1.7.39.1

1.7.4

1.7.5

1.7.51

1.7.52

1.7.53

1.7.6

1.7.7

1.7.8

1.7.9

2.*

2.0.1

2.0.10

2.0.11

2.0.12

2.0.13

2.0.2

2.0.3

2.0.4

2.0.5

2.0.6

2.0.7

2.0.8

2.0.9

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75834.json"