{"id":"CVE-2023-5256","aliases":["BIT-drupal-2023-5256","CLSA-2026-1784682869","DRUPAL-CORE-2023-006","EUVD-2023-2586","GHSA-6ccv-8fgf-cjpw","GHSA-rjqg-3h9m-fx5x","UBUNTU-CVE-2023-5256"],"status":"published","title":"Drupal core - Critical - Cache poisoning - SA-CORE-2023-006","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00851,"percentile":0.58477,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2023-09-20T16:23:05Z","modified":"2026-10-28T02:30:35Z","fixes":[{"ecosystem":"Packagist","package":"drupal/core","fixed_in":["10.1.8","10.2.2","9.5.11","10.0.11","10.1.4"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"drupal","fixed_in":["9.5.11","10.0.11","10.1.4"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"10.1.8"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.2.0"},{"fixed":"10.2.2"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.7.0"},{"fixed":"9.5.11"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.0.0"},{"fixed":"10.0.11"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.1.0"},{"fixed":"10.1.4"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"drupal","ranges":[{"type":"SEMVER","events":[{"introduced":"8.7.0"},{"fixed":"9.5.11"},{"introduced":"10.0.0"},{"fixed":"10.0.11"},{"introduced":"10.1.0"},{"fixed":"10.1.4"}]}]},{"source":"osv","ecosystem":"TuxCare:Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.9.20"},{"fixed":"8.9.20-p1+tuxcare"}]}],"versions":["8.9.20"],"bundled":20},{"source":"osv","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.7.0"},{"fixed":"9.5.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"10.0.0"},{"fixed":"10.0.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"10.1.0"},{"fixed":"10.1.4"}]}],"versions":["10.0.0","10.0.1","10.0.10","10.0.2","10.0.3","10.0.4","10.0.5","10.0.6","10.0.7","10.0.8","10.0.9","10.1.0","10.1.1","10.1.2","10.1.3","8.7.0","8.7.1","8.7.10","8.7.11","8.7.12","8.7.13","8.7.14","8.7.2","8.7.3","8.7.4","8.7.5","8.7.6","8.7.7","8.7.8","8.7.9","8.8.0","8.8.0-alpha1","8.8.0-beta1","8.8.0-rc1","8.8.1","8.8.10","8.8.11","8.8.12","8.8.2","8.8.3","8.8.4","8.8.5","8.8.6","8.8.7","8.8.8","8.8.9","8.9.0","8.9.0-beta1","8.9.0-beta2","8.9.0-beta3","8.9.0-rc1","8.9.1","8.9.10","8.9.11","8.9.12","8.9.13","8.9.14","8.9.15","8.9.16","8.9.17","8.9.18","8.9.19","8.9.2","8.9.20","8.9.3","8.9.4","8.9.5","8.9.6","8.9.7","8.9.8","8.9.9","9.0.0","9.0.0-alpha1","9.0.0-alpha2","9.0.0-beta1","9.0.0-beta2","9.0.0-beta3","9.0.0-rc1","9.0.1","9.0.10","9.0.11","9.0.12","9.0.13","9.0.14","9.0.2","9.0.3","9.0.4","9.0.5","9.0.6","9.0.7","9.0.8","9.0.9","9.1.0","9.1.0-alpha1","9.1.0-beta1","9.1.0-rc1","9.1.0-rc2","9.1.0-rc3","9.1.1","9.1.10","9.1.11","9.1.12","9.1.13","9.1.14","9.1.15","9.1.2","9.1.3","9.1.4","9.1.5","9.1.6","9.1.7","9.1.8","9.1.9","9.2.0","9.2.0-alpha1","9.2.0-beta1","9.2.0-beta2","9.2.0-beta3","9.2.0-rc1","9.2.1","9.2.10","9.2.11","9.2.12","9.2.13","9.2.14","9.2.15","9.2.16","9.2.17","9.2.18","9.2.19","9.2.2","9.2.20","9.2.21","9.2.3","9.2.4","9.2.5","9.2.6","9.2.7","9.2.8","9.2.9","9.3.0","9.3.0-alpha1","9.3.0-beta1","9.3.0-beta2","9.3.0-beta3","9.3.0-rc1","9.3.1","9.3.10","9.3.11","9.3.12","9.3.13","9.3.14","9.3.15","9.3.16","9.3.17","9.3.18","9.3.19","9.3.2","9.3.20","9.3.21","9.3.22","9.3.3","9.3.4","9.3.5","9.3.6","9.3.7","9.3.8","9.3.9","9.4.0","9.4.0-alpha1","9.4.0-beta1","9.4.0-rc1","9.4.0-rc2","9.4.1","9.4.10","9.4.11","9.4.12","9.4.13","9.4.14","9.4.15","9.4.2","9.4.3","9.4.4","9.4.5","9.4.6","9.4.7","9.4.8","9.4.9","9.5.0","9.5.0-beta1","9.5.0-beta2","9.5.0-rc1","9.5.0-rc2","9.5.1","9.5.10","9.5.2","9.5.3","9.5.4","9.5.5","9.5.6","9.5.7","9.5.8","9.5.9"]},{"source":"osv","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"10.1.8"}]}],"versions":["10.0.0","10.0.0-alpha1","10.0.0-alpha2","10.0.0-alpha3","10.0.0-alpha4","10.0.0-alpha5","10.0.0-alpha6","10.0.0-alpha7","10.0.0-beta1","10.0.0-beta2","10.0.0-rc1","10.0.0-rc2","10.0.0-rc3","10.0.1","10.0.10","10.0.11","10.0.2","10.0.3","10.0.4","10.0.5","10.0.6","10.0.7","10.0.8","10.0.9","10.1.0","10.1.0-alpha1","10.1.0-beta1","10.1.0-rc1","10.1.1","10.1.2","10.1.3","10.1.4","10.1.5","10.1.6","10.1.7","8.0.0","8.0.1","8.0.2","8.0.3","8.0.4","8.0.5","8.0.6","8.1.0","8.1.0-beta1","8.1.0-beta2","8.1.0-rc1","8.1.1","8.1.10","8.1.2","8.1.3","8.1.4","8.1.5","8.1.6","8.1.7","8.1.8","8.1.9","8.2.0","8.2.0-beta1","8.2.0-beta2","8.2.0-beta3","8.2.0-rc1","8.2.0-rc2","8.2.1","8.2.2","8.2.3","8.2.4","8.2.5","8.2.6","8.2.7","8.2.8","8.3.0","8.3.0-alpha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Advisory","advisory","web"]},{"url":"https://github.com/drupal/core/commit/2f76ac716ca8019bc60579fdfc8aa6cd65d57dff","tags":["web"]},{"url":"https://github.com/drupal/core/commit/5e606b560ac4ecb08135f12b6165bbe0348346a0","tags":["web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/2024-01-17.yaml","tags":["web"]},{"url":"https://www.drupal.org/sa-core-2024-001","tags":["web"]},{"url":"https://github.com/advisories/GHSA-6ccv-8fgf-cjpw"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5256","tags":["web","advisory"]},{"url":"https://github.com/drupal/core/commit/1cd2741c2b43f6ad1bdfc121b8d9ec3b87e70742","tags":["web"]},{"url":"https://github.com/drupal/core/commit/5495dc530e3acd056478245bfe1828210c6da7dc","tags":["web"]},{"url":"https://github.com/drupal/core/commit/d4fe67562ee3ea0d9ecb9672d2945d94c5633d24","tags":["web"]},{"url":"https://github.com/advisories/GHSA-rjqg-3h9m-fx5x"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5256.json","tags":["advisory"]},{"url":"https://github.com/drupal/core","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2023-5256","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-5256","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-5256","title":"Drupal core - Critical - Cache poisoning - SA-CORE-2023-006","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.\n\n\n\n","status":"published","published":"2023-09-28T18:17:43.128Z","modified":"2024-09-23T18:25:29.327Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:35:17.149492Z"}],"euvd":[{"id":"EUVD-2023-2586","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.\n\n\n\n","status":"published","published":"2023-09-28T18:17:43Z","modified":"2024-09-23T18:25:29Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:16.548139Z"}],"ghsa":[{"id":"GHSA-6ccv-8fgf-cjpw","title":"Drupal core Denial of Service vulnerability","description":"The Comment module allows users to reply to comments. In certain cases, an attacker could make comment reply requests that would trigger a denial of service (DOS).\n\nSites that do not use the Comment module are not affected.","status":"published","published":"2024-02-12T22:31:34Z","modified":"2024-02-12T22:31:36Z","updated_at":"2026-11-02T14:37:38.20753Z"},{"id":"GHSA-rjqg-3h9m-fx5x","title":"Cache poisoning in drupal/core","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.\n\n\n\n","status":"published","published":"2023-09-28T21:30:58Z","modified":"2023-12-20T21:01:00Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:37:27.414424Z"}],"nvd":[{"id":"CVE-2023-5256","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.\n\n\n\n","status":"published","published":"2023-09-28T19:15:10.977Z","modified":"2026-06-17T06:48:11.47Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:08:31.699785Z"}],"osv":[{"id":"CVE-2023-5256","title":"Drupal core - Critical - Cache poisoning - SA-CORE-2023-006","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.\n\n\n\n","status":"published","published":"2023-09-28T18:17:43.128Z","modified":"2026-10-28T02:30:35.810764144Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:44:35.245372Z"},{"id":"UBUNTU-CVE-2023-5256","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation. This vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API. The core REST and contributed GraphQL modules are not affected.","status":"published","published":"2023-09-28T19:15:00Z","modified":"2025-09-08T16:55:57Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:54:23.935133Z"},{"id":"BIT-drupal-2023-5256","title":"Drupal core - Critical - Cache poisoning - SA-CORE-2023-006","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.","status":"published","published":"2024-03-06T10:51:30.695Z","modified":"2026-09-08T08:46:10.402366466Z","updated_at":"2026-11-02T15:28:29.563843Z"},{"id":"CLSA-2026-1784682869","title":"TuxCare security update for drupal/core (21 CVEs)","description":"TuxCare rebuilt drupal/core to address 21 CVEs. Fixed in 8.9.20-p1+tuxcare.","status":"published","published":"2026-08-04T14:52:46Z","modified":"2026-10-15T09:48:00.288868947Z","updated_at":"2026-11-02T15:43:46.482572Z"},{"id":"DRUPAL-CORE-2023-006","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.\n\n[Drupal Steward](/steward) partners have been made aware of this issue. Some platforms may provide mitigations. However, not all WAF configurations can mitigate the issue, so it is still recommended to update promptly to this security release if your site uses JSON:API.","status":"published","published":"2023-09-20T16:23:05Z","modified":"2026-09-19T18:25:15Z","updated_at":"2026-11-02T15:46:13.900249Z"},{"id":"GHSA-6ccv-8fgf-cjpw","title":"Drupal core Denial of Service vulnerability","description":"The Comment module allows users to reply to comments. In certain cases, an attacker could make comment reply requests that would trigger a denial of service (DOS).\n\nSites that do not use the Comment module are not affected.","status":"published","published":"2024-02-12T22:31:34Z","modified":"2024-11-29T05:26:49.838861Z","updated_at":"2026-11-02T15:46:39.618611Z"},{"id":"GHSA-rjqg-3h9m-fx5x","title":"Cache poisoning in drupal/core","description":"In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.\n\nThis vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.\n\nThe core REST and contributed GraphQL modules are not affected.\n\n\n\n","status":"published","published":"2023-09-28T21:30:58Z","modified":"2025-12-10T23:41:07.007502Z","cwes":["CWE-200"],"updated_at":"2026-11-02T15:46:55.877614Z"}]}}