GHSA-r4v4-5mwr-2fwr

Suggest an improvement
Source
https://github.com/advisories/GHSA-r4v4-5mwr-2fwr
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-r4v4-5mwr-2fwr/GHSA-r4v4-5mwr-2fwr.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-r4v4-5mwr-2fwr
Aliases
  • CVE-2026-40477
Published
2026-04-15T19:46:04Z
Modified
2026-05-05T16:10:40.722195Z
Severity
  • 9.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
Improper restriction of the scope of accessible objects in Thymeleaf expressions
Details

Impact

A security bypass vulnerability exists in the expression execution mechanisms of Thymeleaf up to and including 3.1.3.RELEASE. Although the library provides mechanisms to prevent expression injection, it fails to properly restrict the scope of accessible objects, allowing specific potentially sensitive objects to be reached from within a template. If an application developer passes unvalidated user input directly to the template engine, an unauthenticated remote attacker can bypass the library's protections to achieve Server-Side Template Injection (SSTI).

Patches

This has been fixed in Thymeleaf 3.1.4.RELEASE.

Workarounds

No workaround is available beyond ensuring applications do not pass unvalidated user input directly to the template engine. Upgrading to 3.1.4.RELEASE is strongly recommended in any case.

Credits

Thanks to Thomas Reburn (Praetorian) for responsible disclosure.

Database specific 
{
    "nvd_published_at": "2026-04-17T22:16:33Z",
    "severity": "CRITICAL",
    "cwe_ids": [
        "CWE-1336",
        "CWE-917"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-15T19:46:04Z"
}
References

Affected packages

Maven / org.thymeleaf:thymeleaf

Package

Name
org.thymeleaf:thymeleaf
View open source insights on deps.dev
Purl
pkg:maven/org.thymeleaf/thymeleaf

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.4.RELEASE

Affected versions

Other
m1
1.*
1.0.0-beta1
1.0.0-beta2
1.0.0-beta3
1.0.0-beta4
1.0.0-beta5
1.0.0
1.0.1
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
2.*
2.0.0-beta1
2.0.0-beta2
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
2.1.0-beta1
2.1.0-beta2
2.1.0-m1
2.1.0-m2
2.1.0-m3
2.1.0.RELEASE
2.1.1.RELEASE
2.1.2.RELEASE
2.1.3.RELEASE
2.1.4.RELEASE
2.1.5.RELEASE
2.1.6.RELEASE
3.*
3.0.0.ALPHA01
3.0.0.ALPHA02
3.0.0.ALPHA03
3.0.0.BETA01
3.0.0.BETA02
3.0.0.BETA03
3.0.0.RELEASE
3.0.1.RELEASE
3.0.2.RELEASE
3.0.3.RELEASE
3.0.4.RELEASE
3.0.5.RELEASE
3.0.6.RELEASE
3.0.7.RELEASE
3.0.8.RELEASE
3.0.9.RELEASE
3.0.10.RELEASE
3.0.11.RELEASE
3.0.12.RELEASE
3.0.13.RELEASE
3.0.14.RELEASE
3.0.15.RELEASE
3.1.0.M1
3.1.0.M2
3.1.0.M3
3.1.0.RC1
3.1.0.RC2
3.1.0.RELEASE
3.1.1.RELEASE
3.1.2.RELEASE
3.1.3.RELEASE

Database specific

last_known_affected_version_range 
"<= 3.1.3.RELEASE"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-r4v4-5mwr-2fwr/GHSA-r4v4-5mwr-2fwr.json"

Maven / org.thymeleaf:thymeleaf-spring5

Package

Name
org.thymeleaf:thymeleaf-spring5
View open source insights on deps.dev
Purl
pkg:maven/org.thymeleaf/thymeleaf-spring5

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.4.RELEASE

Affected versions

3.*
3.0.3.M1
3.0.4.M2
3.0.5.M3
3.0.6.M4
3.0.7.RC1
3.0.8.RELEASE
3.0.9.RELEASE
3.0.10.RELEASE
3.0.11.RELEASE
3.0.12.RELEASE
3.0.13.RELEASE
3.0.14.RELEASE
3.0.15.RELEASE
3.1.0.M1
3.1.0.M2
3.1.0.M3
3.1.0.RC1
3.1.0.RC2
3.1.0.RELEASE
3.1.1.RELEASE
3.1.2.RELEASE
3.1.3.RELEASE

Database specific

last_known_affected_version_range 
"<= 3.1.3.RELEASE"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-r4v4-5mwr-2fwr/GHSA-r4v4-5mwr-2fwr.json"

Maven / org.thymeleaf:thymeleaf-spring6

Package

Name
org.thymeleaf:thymeleaf-spring6
View open source insights on deps.dev
Purl
pkg:maven/org.thymeleaf/thymeleaf-spring6

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.4.RELEASE

Affected versions

3.*
3.1.0.M1
3.1.0.M2
3.1.0.M3
3.1.0.RC1
3.1.0.RC2
3.1.0.RELEASE
3.1.1.RELEASE
3.1.2.RELEASE
3.1.3.RELEASE

Database specific

last_known_affected_version_range 
"<= 3.1.3.RELEASE"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-r4v4-5mwr-2fwr/GHSA-r4v4-5mwr-2fwr.json"