CVE-2026-55867

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-55867
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55867.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55867
Aliases
Published
2026-08-28T22:14:35.743Z
Modified
2026-08-30T08:17:31.133212Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens
Details

Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/{userId}/tokens/{idOrToken} endpoint implemented by UsersResource.revokeToken() in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERS_TOKENREMOVE permission against the attacker-controlled userId path parameter before resolving the token selected by idOrToken. An authenticated user can provide an authorized userId while accessTokenService.loadById() or accessTokenService.load() resolves a token belonging to another user, including a service account or administrator, after which accessTokenService.destroy() deletes that token without checking AccessToken.getUserName(). The issue does not expose token contents, but unauthorized deletion causes integrity impact and can disrupt access-token-based integrations. This issue is fixed in versions 6.3.12, 7.0.7, and 7.1.2.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55867.json",
    "cwe_ids": [
        "CWE-639"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/graylog2/graylog2-server

Affected ranges

Type
GIT
Repo
https://github.com/graylog2/graylog2-server
Events
Introduced
f35438d187e32050ff4d51e4fb93a70341982ceb
Introduced
dac42698ecd7e1be0652802e6308c55b0fc5cdca
Introduced
a9355313df2c2106f48684eb47617980ab4d42db
Fixed
fd62097b3ac4d3f18641e973e4823ed9bf663122
Fixed
5cd524ef532ecf6c77fe5efebcd0d2a5143f893c
Fixed
adc626831f3170716845df46ae9237b7e93e1d7d
Fixed
41d3745d0e52736d06c07d279ca0d72c1616df4c
Fixed
4f280138b53dc3bbb5749213e8cb1c8e372f23a2
Fixed
84b0ffa0bdf918f6edd2bb23a47254088634b1fc
Fixed
e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "6.2.0"
        },
        {
            "fixed": "6.3.12"
        },
        {
            "introduced": "7.0.0-alpha.1"
        },
        {
            "fixed": "7.0.7"
        },
        {
            "introduced": "7.1.0-alpha.1"
        },
        {
            "fixed": "7.1.2"
        }
    ]
}

Affected versions

7.*
7.0.0
7.0.0-alpha.1
7.0.0-alpha.2
7.0.0-beta.1
7.0.0-beta.2
7.0.0-beta.3
7.0.0-beta.4
7.0.0-beta.5
7.0.0-rc.1
7.0.0-rc.2
7.0.1
7.0.2
7.0.3
7.0.4
7.0.5
7.0.6
7.1.0
7.1.0-alpha.1
7.1.0-alpha.2
7.1.0-alpha.3
7.1.0-beta.1
7.1.0-beta.2
7.1.0-rc.1
7.1.0-rc.2
7.1.1

Database specific

vanir_signatures 
[
    {
        "id": "CVE-2026-55867-2bc1f162",
        "target": {
            "file": "graylog2-server/src/test/java/org/graylog2/rest/resources/users/UsersResourceTest.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "295368719508396695023785709866863041565",
                "271123227653825792802890504985920761783",
                "193520922891013442279544008467245768823",
                "95404190445655841866979607662353971351",
                "237230490934632326664624861112730102690",
                "123993329747089421496334943407972188652",
                "75346638319631699244224929533130326618"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/84b0ffa0bdf918f6edd2bb23a47254088634b1fc",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-55867-5189ff5f",
        "target": {
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "198343310415006386537422207054284210802",
                "172795118323590513781945283172438932199",
                "335828493656977414860298202064652440164",
                "334740112069284329908665999421806278592",
                "242268432618238020999146333375926306333",
                "258335049688956787604957068549566668503",
                "232866151658578787972202196664451963619",
                "18410288275292206068337962452299218730",
                "942843258178895881071606268116120673",
                "150560594450223640127881346758862433115",
                "6006340583476593612749392589259554679",
                "37548927507754163234360810516937138346",
                "44583967945763920996826159524007252664",
                "267920557632338034117803626447014332169",
                "102216138070095780132096098821975062392"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-55867-5d8b98bb",
        "target": {
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "92649159899843690700169386539267723116",
                "99234463948897691201042499467074891434",
                "121913591008655909448279093711875224736",
                "334740112069284329908665999421806278592",
                "242268432618238020999146333375926306333",
                "258335049688956787604957068549566668503",
                "232866151658578787972202196664451963619",
                "18410288275292206068337962452299218730",
                "942843258178895881071606268116120673",
                "150560594450223640127881346758862433115",
                "6006340583476593612749392589259554679",
                "37548927507754163234360810516937138346",
                "44583967945763920996826159524007252664",
                "267920557632338034117803626447014332169",
                "102216138070095780132096098821975062392"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/84b0ffa0bdf918f6edd2bb23a47254088634b1fc",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-55867-8c7ecd89",
        "target": {
            "file": "graylog2-server/src/test/java/org/graylog2/rest/resources/users/UsersResourceTest.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "92921124607529843552514715159079035761",
                "193051788338912352364759568719035942906",
                "335895787483757360467808523278841275016",
                "242907837181214563041323974111452824449",
                "237230490934632326664624861112730102690",
                "121453652057684229226839435699453882978",
                "278861709566330121511268416884909914125"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/4f280138b53dc3bbb5749213e8cb1c8e372f23a2",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-55867-992a09b2",
        "target": {
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "92649159899843690700169386539267723116",
                "99234463948897691201042499467074891434",
                "121913591008655909448279093711875224736",
                "334740112069284329908665999421806278592",
                "242268432618238020999146333375926306333",
                "258335049688956787604957068549566668503",
                "232866151658578787972202196664451963619",
                "18410288275292206068337962452299218730",
                "942843258178895881071606268116120673",
                "150560594450223640127881346758862433115",
                "6006340583476593612749392589259554679",
                "37548927507754163234360810516937138346",
                "44583967945763920996826159524007252664",
                "267920557632338034117803626447014332169",
                "102216138070095780132096098821975062392"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/41d3745d0e52736d06c07d279ca0d72c1616df4c",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-55867-ab257330",
        "target": {
            "function": "revokeToken",
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "103753533631485089146284062194198812524",
            "length": 683.0
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/4f280138b53dc3bbb5749213e8cb1c8e372f23a2",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2026-55867-d29b4025",
        "target": {
            "function": "revokeToken",
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "103753533631485089146284062194198812524",
            "length": 683.0
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2026-55867-d304d26c",
        "target": {
            "file": "graylog2-server/src/test/java/org/graylog2/rest/resources/users/UsersResourceTest.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "295368719508396695023785709866863041565",
                "271123227653825792802890504985920761783",
                "193520922891013442279544008467245768823",
                "95404190445655841866979607662353971351",
                "237230490934632326664624861112730102690",
                "123993329747089421496334943407972188652",
                "75346638319631699244224929533130326618"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/41d3745d0e52736d06c07d279ca0d72c1616df4c",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-55867-f3b05c24",
        "target": {
            "function": "revokeToken",
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "171503515837936334037705507065910067717",
            "length": 685.0
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/41d3745d0e52736d06c07d279ca0d72c1616df4c",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2026-55867-f63e4c9a",
        "target": {
            "file": "graylog2-server/src/test/java/org/graylog2/rest/resources/users/UsersResourceTest.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "295368719508396695023785709866863041565",
                "294944023983977225180282478353803002383",
                "300985597634701130340237784341980252820",
                "242907837181214563041323974111452824449",
                "237230490934632326664624861112730102690",
                "242773901794039825549336031703396983133",
                "219311786410835367189912993709208555881"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-55867-f994fa17",
        "target": {
            "function": "revokeToken",
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "171503515837936334037705507065910067717",
            "length": 685.0
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/84b0ffa0bdf918f6edd2bb23a47254088634b1fc",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2026-55867-fc3e7c4e",
        "target": {
            "file": "graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "198343310415006386537422207054284210802",
                "172795118323590513781945283172438932199",
                "335828493656977414860298202064652440164",
                "334740112069284329908665999421806278592",
                "242268432618238020999146333375926306333",
                "258335049688956787604957068549566668503",
                "232866151658578787972202196664451963619",
                "18410288275292206068337962452299218730",
                "942843258178895881071606268116120673",
                "150560594450223640127881346758862433115",
                "6006340583476593612749392589259554679",
                "37548927507754163234360810516937138346",
                "44583967945763920996826159524007252664",
                "267920557632338034117803626447014332169",
                "102216138070095780132096098821975062392"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/graylog2/graylog2-server/commit/4f280138b53dc3bbb5749213e8cb1c8e372f23a2",
        "signature_type": "Line"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55867.json"
vanir_signatures_modified 
"2026-08-30T08:17:31Z"