GHSA-r29c-68gh-xp6x

Suggest an improvement
Source
https://github.com/advisories/GHSA-r29c-68gh-xp6x
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-r29c-68gh-xp6x
Aliases
Downstream
Published
2026-05-12T18:30:38Z
Modified
2026-09-10T03:50:55Z
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
Apache Tomcat - HTTP/2 request headers not validated
Details

Versions Affected: Apache Tomcat 11.0.0-M1 to 11.0.21 Apache Tomcat 10.1.0-M1 to 10.1.54 Apache Tomcat 9.0.0.M1 to 9.0.117 Older, unsupported versions may also be affected

Description: HTTP/2 request headers were not validated which may have triggered unexpected application behaviour if the application (quite reasonably) assumed that header value exposed through the Servlet API would be specification compliant.

Mitigation: Users of the affected versions should apply one of the following mitigations:

  • Upgrade to Apache Tomcat 11.0.22 or later
  • Upgrade to Apache Tomcat 10.1.55 or later
  • Upgrade to Apache Tomcat 9.0.118 or later

Credit: This issue was identified by Dawit Jeong (@dawitngoliath)

Database specific 
{
    "cwe_ids": [
        "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-18T20:28:53Z",
    "nvd_published_at": "2026-05-12T16:16:17Z",
    "severity": "CRITICAL"
}
References

Affected packages

Maven
org.apache.tomcat.embed:tomcat-embed-core

Package

Name
org.apache.tomcat.embed:tomcat-embed-core
View open source insights on deps.dev
Purl
pkg:maven/org.apache.tomcat.embed/tomcat-embed-core

Affected ranges

Type
ECOSYSTEM
Events
Introduced
8.5.0
Fixed
9.0.118

Affected versions

8.*
8.5.0
8.5.2
8.5.3
8.5.4
8.5.5
8.5.6
8.5.8
8.5.9
8.5.11
8.5.12
8.5.13
8.5.14
8.5.15
8.5.16
8.5.19
8.5.20
8.5.21
8.5.23
8.5.24
8.5.27
8.5.28
8.5.29
8.5.30
8.5.31
8.5.32
8.5.33
8.5.34
8.5.35
8.5.37
8.5.38
8.5.39
8.5.40
8.5.41
8.5.42
8.5.43
8.5.45
8.5.46
8.5.47
8.5.49
8.5.50
8.5.51
8.5.53
8.5.54
8.5.55
8.5.56
8.5.57
8.5.58
8.5.59
8.5.60
8.5.61
8.5.63
8.5.64
8.5.65
8.5.66
8.5.68
8.5.69
8.5.70
8.5.71
8.5.72
8.5.73
8.5.75
8.5.76
8.5.77
8.5.78
8.5.79
8.5.81
8.5.82
8.5.83
8.5.84
8.5.85
8.5.86
8.5.87
8.5.88
8.5.89
8.5.90
8.5.91
8.5.92
8.5.93
8.5.94
8.5.95
8.5.96
8.5.97
8.5.98
8.5.99
8.5.100
9.*
9.0.0.M1
9.0.0.M3
9.0.0.M4
9.0.0.M6
9.0.0.M8
9.0.0.M9
9.0.0.M10
9.0.0.M11
9.0.0.M13
9.0.0.M15
9.0.0.M17
9.0.0.M18
9.0.0.M19
9.0.0.M20
9.0.0.M21
9.0.0.M22
9.0.0.M25
9.0.0.M26
9.0.0.M27
9.0.1
9.0.2
9.0.4
9.0.5
9.0.6
9.0.7
9.0.8
9.0.10
9.0.11
9.0.12
9.0.13
9.0.14
9.0.16
9.0.17
9.0.19
9.0.20
9.0.21
9.0.22
9.0.24
9.0.26
9.0.27
9.0.29
9.0.30
9.0.31
9.0.33
9.0.34
9.0.35
9.0.36
9.0.37
9.0.38
9.0.39
9.0.40
9.0.41
9.0.43
9.0.44
9.0.45
9.0.46
9.0.48
9.0.50
9.0.52
9.0.53
9.0.54
9.0.55
9.0.56
9.0.58
9.0.59
9.0.60
9.0.62
9.0.63
9.0.64
9.0.65
9.0.67
9.0.68
9.0.69
9.0.70
9.0.71
9.0.72
9.0.73
9.0.74
9.0.75
9.0.76
9.0.78
9.0.79
9.0.80
9.0.81
9.0.82
9.0.83
9.0.84
9.0.85
9.0.86
9.0.87
9.0.88
9.0.89
9.0.90
9.0.91
9.0.93
9.0.94
9.0.95
9.0.96
9.0.97
9.0.98
9.0.99
9.0.100
9.0.102
9.0.104
9.0.105
9.0.106
9.0.107
9.0.108
9.0.109
9.0.110
9.0.111
9.0.112
9.0.113
9.0.115
9.0.116
9.0.117

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat.embed:tomcat-embed-core

Package

Name
org.apache.tomcat.embed:tomcat-embed-core
View open source insights on deps.dev
Purl
pkg:maven/org.apache.tomcat.embed/tomcat-embed-core

Affected ranges

Type
ECOSYSTEM
Events
Introduced
10.1.0-M1
Fixed
10.1.55

Affected versions

10.*
10.1.0-M1
10.1.0-M2
10.1.0-M4
10.1.0-M5
10.1.0-M6
10.1.0-M7
10.1.0-M8
10.1.0-M10
10.1.0-M11
10.1.0-M12
10.1.0-M14
10.1.0-M15
10.1.0-M16
10.1.0-M17
10.1.0
10.1.1
10.1.2
10.1.4
10.1.5
10.1.6
10.1.7
10.1.8
10.1.9
10.1.10
10.1.11
10.1.12
10.1.13
10.1.14
10.1.15
10.1.16
10.1.17
10.1.18
10.1.19
10.1.20
10.1.23
10.1.24
10.1.25
10.1.26
10.1.28
10.1.29
10.1.30
10.1.31
10.1.33
10.1.34
10.1.35
10.1.36
10.1.39
10.1.40
10.1.41
10.1.42
10.1.43
10.1.44
10.1.45
10.1.46
10.1.47
10.1.48
10.1.49
10.1.50
10.1.52
10.1.53
10.1.54

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat.embed:tomcat-embed-core

Package

Name
org.apache.tomcat.embed:tomcat-embed-core
View open source insights on deps.dev
Purl
pkg:maven/org.apache.tomcat.embed/tomcat-embed-core

Affected ranges

Type
ECOSYSTEM
Events
Introduced
11.0.0-M1
Fixed
11.0.22

Affected versions

11.*
11.0.0-M1
11.0.0-M3
11.0.0-M4
11.0.0-M5
11.0.0-M6
11.0.0-M7
11.0.0-M9
11.0.0-M10
11.0.0-M11
11.0.0-M12
11.0.0-M13
11.0.0-M14
11.0.0-M15
11.0.0-M16
11.0.0-M17
11.0.0-M18
11.0.0-M19
11.0.0-M20
11.0.0-M21
11.0.0-M22
11.0.0-M24
11.0.0-M25
11.0.0-M26
11.0.0
11.0.1
11.0.2
11.0.3
11.0.4
11.0.5
11.0.6
11.0.7
11.0.8
11.0.9
11.0.10
11.0.11
11.0.12
11.0.13
11.0.14
11.0.15
11.0.18
11.0.20
11.0.21

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat:tomcat

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
8.5.0
Fixed
9.0.118

Affected versions

8.*
8.5.0
8.5.2
8.5.3
8.5.4
8.5.5
8.5.6
8.5.8
8.5.9
8.5.11
8.5.12
8.5.13
8.5.14
8.5.15
8.5.16
8.5.19
8.5.20
8.5.21
8.5.23
8.5.24
8.5.27
8.5.28
8.5.29
8.5.30
8.5.31
8.5.32
8.5.33
8.5.34
8.5.35
8.5.37
8.5.38
8.5.39
8.5.40
8.5.41
8.5.42
8.5.43
8.5.45
8.5.46
8.5.47
8.5.49
8.5.50
8.5.51
8.5.53
8.5.54
8.5.55
8.5.56
8.5.57
8.5.58
8.5.59
8.5.60
8.5.61
8.5.63
8.5.64
8.5.65
8.5.66
8.5.68
8.5.69
8.5.70
8.5.71
8.5.72
8.5.73
8.5.75
8.5.76
8.5.77
8.5.78
8.5.79
8.5.81
8.5.82
8.5.83
8.5.84
8.5.85
8.5.86
8.5.87
8.5.88
8.5.89
8.5.90
8.5.91
8.5.92
8.5.93
8.5.94
8.5.95
8.5.96
8.5.97
8.5.98
8.5.99
8.5.100
9.*
9.0.0.M1
9.0.0.M3
9.0.0.M4
9.0.0.M6
9.0.0.M8
9.0.0.M9
9.0.0.M10
9.0.0.M11
9.0.0.M13
9.0.0.M15
9.0.0.M17
9.0.0.M18
9.0.0.M19
9.0.0.M20
9.0.0.M21
9.0.0.M22
9.0.0.M25
9.0.0.M26
9.0.0.M27
9.0.1
9.0.2
9.0.4
9.0.5
9.0.6
9.0.7
9.0.8
9.0.10
9.0.11
9.0.12
9.0.13
9.0.14
9.0.16
9.0.17
9.0.19
9.0.20
9.0.21
9.0.22
9.0.24
9.0.26
9.0.27
9.0.29
9.0.30
9.0.31
9.0.33
9.0.34
9.0.35
9.0.36
9.0.37
9.0.38
9.0.39
9.0.40
9.0.41
9.0.43
9.0.44
9.0.45
9.0.46
9.0.48
9.0.50
9.0.52
9.0.53
9.0.54
9.0.55
9.0.56
9.0.58
9.0.59
9.0.60
9.0.62
9.0.63
9.0.64
9.0.65
9.0.67
9.0.68
9.0.69
9.0.70
9.0.71
9.0.72
9.0.73
9.0.74
9.0.75
9.0.76
9.0.78
9.0.79
9.0.80
9.0.81
9.0.82
9.0.83
9.0.84
9.0.85
9.0.86
9.0.87
9.0.88
9.0.89
9.0.90
9.0.91
9.0.93
9.0.94
9.0.95
9.0.96
9.0.97
9.0.98
9.0.99
9.0.100
9.0.102
9.0.104
9.0.105
9.0.106
9.0.107
9.0.108
9.0.109
9.0.110
9.0.111
9.0.112
9.0.113
9.0.115
9.0.116
9.0.117

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat:tomcat

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
10.1.0-M1
Fixed
10.1.55

Affected versions

10.*
10.1.0-M1
10.1.0-M2
10.1.0-M4
10.1.0-M5
10.1.0-M6
10.1.0-M7
10.1.0-M8
10.1.0-M10
10.1.0-M11
10.1.0-M12
10.1.0-M14
10.1.0-M15
10.1.0-M16
10.1.0-M17
10.1.0
10.1.1
10.1.2
10.1.4
10.1.5
10.1.6
10.1.7
10.1.8
10.1.9
10.1.10
10.1.11
10.1.12
10.1.13
10.1.14
10.1.15
10.1.16
10.1.17
10.1.18
10.1.19
10.1.20
10.1.23
10.1.24
10.1.25
10.1.26
10.1.28
10.1.29
10.1.30
10.1.31
10.1.33
10.1.34
10.1.35
10.1.36
10.1.39
10.1.40
10.1.41
10.1.42
10.1.43
10.1.44
10.1.45
10.1.46
10.1.47
10.1.48
10.1.49
10.1.50
10.1.52
10.1.53
10.1.54

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat:tomcat

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
11.0.0-M1
Fixed
11.0.22

Affected versions

11.*
11.0.0-M1
11.0.0-M3
11.0.0-M4
11.0.0-M5
11.0.0-M6
11.0.0-M7
11.0.0-M9
11.0.0-M10
11.0.0-M11
11.0.0-M12
11.0.0-M13
11.0.0-M14
11.0.0-M15
11.0.0-M16
11.0.0-M17
11.0.0-M18
11.0.0-M19
11.0.0-M20
11.0.0-M21
11.0.0-M22
11.0.0-M24
11.0.0-M25
11.0.0-M26
11.0.0
11.0.1
11.0.2
11.0.3
11.0.4
11.0.5
11.0.6
11.0.7
11.0.8
11.0.9
11.0.10
11.0.11
11.0.12
11.0.13
11.0.14
11.0.15
11.0.18
11.0.20
11.0.21

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat:tomcat-coyote

Package

Name
org.apache.tomcat:tomcat-coyote
View open source insights on deps.dev
Purl
pkg:maven/org.apache.tomcat/tomcat-coyote

Affected ranges

Type
ECOSYSTEM
Events
Introduced
8.5.0
Fixed
9.0.118

Affected versions

8.*
8.5.0
8.5.2
8.5.3
8.5.4
8.5.5
8.5.6
8.5.8
8.5.9
8.5.11
8.5.12
8.5.13
8.5.14
8.5.15
8.5.16
8.5.19
8.5.20
8.5.21
8.5.23
8.5.24
8.5.27
8.5.28
8.5.29
8.5.30
8.5.31
8.5.32
8.5.33
8.5.34
8.5.35
8.5.37
8.5.38
8.5.39
8.5.40
8.5.41
8.5.42
8.5.43
8.5.45
8.5.46
8.5.47
8.5.49
8.5.50
8.5.51
8.5.53
8.5.54
8.5.55
8.5.56
8.5.57
8.5.58
8.5.59
8.5.60
8.5.61
8.5.63
8.5.64
8.5.65
8.5.66
8.5.68
8.5.69
8.5.70
8.5.71
8.5.72
8.5.73
8.5.75
8.5.76
8.5.77
8.5.78
8.5.79
8.5.81
8.5.82
8.5.83
8.5.84
8.5.85
8.5.86
8.5.87
8.5.88
8.5.89
8.5.90
8.5.91
8.5.92
8.5.93
8.5.94
8.5.95
8.5.96
8.5.97
8.5.98
8.5.99
8.5.100
9.*
9.0.0.M1
9.0.0.M3
9.0.0.M4
9.0.0.M6
9.0.0.M8
9.0.0.M9
9.0.0.M10
9.0.0.M11
9.0.0.M13
9.0.0.M15
9.0.0.M17
9.0.0.M18
9.0.0.M19
9.0.0.M20
9.0.0.M21
9.0.0.M22
9.0.0.M25
9.0.0.M26
9.0.0.M27
9.0.1
9.0.2
9.0.4
9.0.5
9.0.6
9.0.7
9.0.8
9.0.10
9.0.11
9.0.12
9.0.13
9.0.14
9.0.16
9.0.17
9.0.19
9.0.20
9.0.21
9.0.22
9.0.24
9.0.26
9.0.27
9.0.29
9.0.30
9.0.31
9.0.33
9.0.34
9.0.35
9.0.36
9.0.37
9.0.38
9.0.39
9.0.40
9.0.41
9.0.43
9.0.44
9.0.45
9.0.46
9.0.48
9.0.50
9.0.52
9.0.53
9.0.54
9.0.55
9.0.56
9.0.58
9.0.59
9.0.60
9.0.62
9.0.63
9.0.64
9.0.65
9.0.67
9.0.68
9.0.69
9.0.70
9.0.71
9.0.72
9.0.73
9.0.74
9.0.75
9.0.76
9.0.78
9.0.79
9.0.80
9.0.81
9.0.82
9.0.83
9.0.84
9.0.85
9.0.86
9.0.87
9.0.88
9.0.89
9.0.90
9.0.91
9.0.93
9.0.94
9.0.95
9.0.96
9.0.97
9.0.98
9.0.99
9.0.100
9.0.102
9.0.104
9.0.105
9.0.106
9.0.107
9.0.108
9.0.109
9.0.110
9.0.111
9.0.112
9.0.113
9.0.115
9.0.116
9.0.117

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat:tomcat-coyote

Package

Name
org.apache.tomcat:tomcat-coyote
View open source insights on deps.dev
Purl
pkg:maven/org.apache.tomcat/tomcat-coyote

Affected ranges

Type
ECOSYSTEM
Events
Introduced
10.1.0-M1
Fixed
10.1.55

Affected versions

10.*
10.1.0-M1
10.1.0-M2
10.1.0-M4
10.1.0-M5
10.1.0-M6
10.1.0-M7
10.1.0-M8
10.1.0-M10
10.1.0-M11
10.1.0-M12
10.1.0-M14
10.1.0-M15
10.1.0-M16
10.1.0-M17
10.1.0
10.1.1
10.1.2
10.1.4
10.1.5
10.1.6
10.1.7
10.1.8
10.1.9
10.1.10
10.1.11
10.1.12
10.1.13
10.1.14
10.1.15
10.1.16
10.1.17
10.1.18
10.1.19
10.1.20
10.1.23
10.1.24
10.1.25
10.1.26
10.1.28
10.1.29
10.1.30
10.1.31
10.1.33
10.1.34
10.1.35
10.1.36
10.1.39
10.1.40
10.1.41
10.1.42
10.1.43
10.1.44
10.1.45
10.1.46
10.1.47
10.1.48
10.1.49
10.1.50
10.1.52
10.1.53
10.1.54

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"
org.apache.tomcat:tomcat-coyote

Package

Name
org.apache.tomcat:tomcat-coyote
View open source insights on deps.dev
Purl
pkg:maven/org.apache.tomcat/tomcat-coyote

Affected ranges

Type
ECOSYSTEM
Events
Introduced
11.0.0-M1
Fixed
11.0.22

Affected versions

11.*
11.0.0-M1
11.0.0-M3
11.0.0-M4
11.0.0-M5
11.0.0-M6
11.0.0-M7
11.0.0-M9
11.0.0-M10
11.0.0-M11
11.0.0-M12
11.0.0-M13
11.0.0-M14
11.0.0-M15
11.0.0-M16
11.0.0-M17
11.0.0-M18
11.0.0-M19
11.0.0-M20
11.0.0-M21
11.0.0-M22
11.0.0-M24
11.0.0-M25
11.0.0-M26
11.0.0
11.0.1
11.0.2
11.0.3
11.0.4
11.0.5
11.0.6
11.0.7
11.0.8
11.0.9
11.0.10
11.0.11
11.0.12
11.0.13
11.0.14
11.0.15
11.0.18
11.0.20
11.0.21

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-r29c-68gh-xp6x/GHSA-r29c-68gh-xp6x.json"