CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5531 vulnerabilities reference this CWE, most recent first.
GHSA-6XFF-CPCQ-VPW2
Vulnerability from github – Published: 2026-06-19 21:32 – Updated: 2026-06-19 21:32A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.
{
"affected": [],
"aliases": [
"CVE-2026-27878"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-19T19:16:34Z",
"severity": "MODERATE"
},
"details": "A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.",
"id": "GHSA-6xff-cpcq-vpw2",
"modified": "2026-06-19T21:32:47Z",
"published": "2026-06-19T21:32:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27878"
},
{
"type": "WEB",
"url": "https://grafana.com/security/security-advisories/cve-2026-27878"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6XGJ-C5FX-5V57
Vulnerability from github – Published: 2025-03-20 12:32 – Updated: 2025-03-21 16:17A Denial of Service (DoS) vulnerability in the multipart request boundary processing mechanism of eosphoros-ai/db-gpt v0.6.0 allows unauthenticated attackers to cause excessive resource consumption. The server fails to handle excessive characters appended to the end of multipart boundaries, leading to an infinite loop and complete denial of service for all users. This vulnerability affects all endpoints processing multipart/form-data requests.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "dbgpt"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.6.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-10829"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-835"
],
"github_reviewed": true,
"github_reviewed_at": "2025-03-21T16:17:52Z",
"nvd_published_at": "2025-03-20T10:15:20Z",
"severity": "HIGH"
},
"details": "A Denial of Service (DoS) vulnerability in the multipart request boundary processing mechanism of eosphoros-ai/db-gpt v0.6.0 allows unauthenticated attackers to cause excessive resource consumption. The server fails to handle excessive characters appended to the end of multipart boundaries, leading to an infinite loop and complete denial of service for all users. This vulnerability affects all endpoints processing multipart/form-data requests.",
"id": "GHSA-6xgj-c5fx-5v57",
"modified": "2025-03-21T16:17:52Z",
"published": "2025-03-20T12:32:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-10829"
},
{
"type": "PACKAGE",
"url": "https://github.com/eosphoros-ai/DB-GPT"
},
{
"type": "WEB",
"url": "https://huntr.com/bounties/e3a4a0ad-a2e0-497f-a2e0-e3c0ec7c4de4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "DB-GPT Uncontrolled Resource Consumption vulnerability"
}
GHSA-6XH2-93P9-VQH4
Vulnerability from github – Published: 2026-06-30 18:32 – Updated: 2026-06-30 18:32Summary
oban_web 2.12.0 introduced a cron expression parser that expands --separated ranges without validating the endpoints. An attacker with access to schedule cron jobs can submit a malicious expression; when any user with dashboard access views the cron job list, Oban.Web.CronExpr.describe/1 is called to render it, triggering allocation of gigabytes of memory and stalling or crashing the BEAM node.
Details
1. Scheduling: The attacker submits a cron job with a malicious expression such as "0 0 1-100000000 * *". No special privilege is required beyond the ability to schedule cron jobs.
2. Parsing: When the cron list is rendered in the dashboard, describe/1 calls parse_range/1 in lib/oban/web/cron_expr.ex, which calls Integer.parse/1 on both endpoints of the range with no bounds check, returning {:range, start_val, end_val} for any integers.
3. Eager expansion: expand_dom_parts/1 and expand_dow_parts/1 materialise the range via Enum.to_list(start_val..end_val). The input above produces ~100 million integers (~2.4 GB). A sibling helper extract_dom_values already validates range bounds, but the expansion helpers do not.
PoC
- Schedule a cron job with expression
"0 0 1-100000000 * *"(or any expression with an out-of-domain range). - Have any user with Oban.Web dashboard access navigate to the cron job list.
- The dashboard calls
describe/1to render the expression, exhausting BEAM memory and crashing the node.
Impact
CVSS 4.0 score 5.9 (Medium). Affects oban_web >= 2.12.0. Requires the ability to schedule a cron job and a dashboard user to view the cron list; no further privileges are needed.
References
- Introduction commit: https://github.com/oban-bg/oban_web/commit/a97c7960bb389b05aaab4cf8042985f02ceddc24
- Patch commit: https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d
{
"affected": [
{
"package": {
"ecosystem": "Hex",
"name": "oban_web"
},
"ranges": [
{
"events": [
{
"introduced": "2.12.0"
},
{
"fixed": "2.12.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-48593"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-30T18:32:49Z",
"nvd_published_at": "2026-05-26T21:16:41Z",
"severity": "MODERATE"
},
"details": "### Summary\n\n`oban_web` 2.12.0 introduced a cron expression parser that expands `-`-separated ranges without validating the endpoints. An attacker with access to schedule cron jobs can submit a malicious expression; when any user with dashboard access views the cron job list, `Oban.Web.CronExpr.describe/1` is called to render it, triggering allocation of gigabytes of memory and stalling or crashing the BEAM node.\n\n### Details\n\n**1. Scheduling:** The attacker submits a cron job with a malicious expression such as `\"0 0 1-100000000 * *\"`. No special privilege is required beyond the ability to schedule cron jobs.\n\n**2. Parsing:** When the cron list is rendered in the dashboard, `describe/1` calls `parse_range/1` in `lib/oban/web/cron_expr.ex`, which calls `Integer.parse/1` on both endpoints of the range with no bounds check, returning `{:range, start_val, end_val}` for any integers.\n\n**3. Eager expansion:** `expand_dom_parts/1` and `expand_dow_parts/1` materialise the range via `Enum.to_list(start_val..end_val)`. The input above produces ~100 million integers (~2.4 GB). A sibling helper `extract_dom_values` already validates range bounds, but the expansion helpers do not.\n\n### PoC\n\n1. Schedule a cron job with expression `\"0 0 1-100000000 * *\"` (or any expression with an out-of-domain range).\n2. Have any user with Oban.Web dashboard access navigate to the cron job list.\n3. The dashboard calls `describe/1` to render the expression, exhausting BEAM memory and crashing the node.\n\n### Impact\n\nCVSS 4.0 score 5.9 (Medium). Affects `oban_web` \u003e= 2.12.0. Requires the ability to schedule a cron job and a dashboard user to view the cron list; no further privileges are needed.\n\n### References\n\n* Introduction commit: https://github.com/oban-bg/oban_web/commit/a97c7960bb389b05aaab4cf8042985f02ceddc24\n* Patch commit: https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d",
"id": "GHSA-6xh2-93p9-vqh4",
"modified": "2026-06-30T18:32:49Z",
"published": "2026-06-30T18:32:49Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/oban-bg/oban_web/security/advisories/GHSA-6xh2-93p9-vqh4"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48593"
},
{
"type": "WEB",
"url": "https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d"
},
{
"type": "WEB",
"url": "https://github.com/oban-bg/oban_web/commit/a97c7960bb389b05aaab4cf8042985f02ceddc24"
},
{
"type": "WEB",
"url": "https://cna.erlef.org/cves/CVE-2026-48593.html"
},
{
"type": "PACKAGE",
"url": "https://github.com/oban-bg/oban_web"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-48593"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "oban_web: Unbounded range expansion in cron describe causes memory exhaustion"
}
GHSA-6XR5-5RM7-VHMX
Vulnerability from github – Published: 2022-09-02 00:01 – Updated: 2022-09-08 00:00IBM Cognos Analytics 11.1.7, 11.2.0, and 11.2.1 is vulnerable to a denial of service via email flooding caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available CPU resources. IBM X-Force ID: 227591.
{
"affected": [],
"aliases": [
"CVE-2022-30614"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-09-01T19:15:00Z",
"severity": "HIGH"
},
"details": "IBM Cognos Analytics 11.1.7, 11.2.0, and 11.2.1 is vulnerable to a denial of service via email flooding caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available CPU resources. IBM X-Force ID: 227591.",
"id": "GHSA-6xr5-5rm7-vhmx",
"modified": "2022-09-08T00:00:33Z",
"published": "2022-09-02T00:01:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-30614"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/227591"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20221014-0005"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/6615285"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6XVM-9875-GVQP
Vulnerability from github – Published: 2022-05-13 01:01 – Updated: 2022-05-13 01:01An exploitable insufficient resource pool vulnerability exists in the session communication functionality of Allen Bradley Micrologix 1400 Series B Firmware 21.2 and before. A specially crafted stream of packets can cause a flood of the session resource pool resulting in legitimate connections to the PLC being disconnected. An attacker can send unauthenticated packets to trigger this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2017-12093"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-04-05T21:29:00Z",
"severity": "HIGH"
},
"details": "An exploitable insufficient resource pool vulnerability exists in the session communication functionality of Allen Bradley Micrologix 1400 Series B Firmware 21.2 and before. A specially crafted stream of packets can cause a flood of the session resource pool resulting in legitimate connections to the PLC being disconnected. An attacker can send unauthenticated packets to trigger this vulnerability.",
"id": "GHSA-6xvm-9875-gvqp",
"modified": "2022-05-13T01:01:40Z",
"published": "2022-05-13T01:01:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-12093"
},
{
"type": "WEB",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0445"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6XW4-3V39-52MM
Vulnerability from github – Published: 2025-10-10 17:33 – Updated: 2025-10-13 15:46Summary
Rack::Request#POST reads the entire request body into memory for Content-Type: application/x-www-form-urlencoded, calling rack.input.read(nil) without enforcing a length or cap. Large request bodies can therefore be buffered completely into process memory before parsing, leading to denial of service (DoS) through memory exhaustion.
Details
When handling non-multipart form submissions, Rack’s request parser performs:
form_vars = get_header(RACK_INPUT).read
Since read is called with no argument, the entire request body is loaded into a Ruby String. This occurs before query parameter parsing or enforcement of any params_limit. As a result, Rack applications without an upstream body-size limit can experience unbounded memory allocation proportional to request size.
Impact
Attackers can send large application/x-www-form-urlencoded bodies to consume process memory, causing slowdowns or termination by the operating system (OOM). The effect scales linearly with request size and concurrency. Even with parsing limits configured, the issue occurs before those limits are enforced.
Mitigation
- Update to a patched version of Rack that enforces form parameter limits using
query_parser.bytesize_limit, preventing unbounded reads ofapplication/x-www-form-urlencodedbodies. - Enforce strict maximum body size at the proxy or web server layer (e.g., Nginx
client_max_body_size, ApacheLimitRequestBody).
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "rack"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.20"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "RubyGems",
"name": "rack"
},
"ranges": [
{
"events": [
{
"introduced": "3.0"
},
{
"fixed": "3.1.18"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "RubyGems",
"name": "rack"
},
"ranges": [
{
"events": [
{
"introduced": "3.2"
},
{
"fixed": "3.2.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-61919"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2025-10-10T17:33:35Z",
"nvd_published_at": "2025-10-10T20:15:37Z",
"severity": "HIGH"
},
"details": "## Summary\n\n`Rack::Request#POST` reads the entire request body into memory for `Content-Type: application/x-www-form-urlencoded`, calling `rack.input.read(nil)` without enforcing a length or cap. Large request bodies can therefore be buffered completely into process memory before parsing, leading to denial of service (DoS) through memory exhaustion.\n\n## Details\n\nWhen handling non-multipart form submissions, Rack\u2019s request parser performs:\n\n```ruby\nform_vars = get_header(RACK_INPUT).read\n```\n\nSince `read` is called with no argument, the entire request body is loaded into a Ruby `String`. This occurs before query parameter parsing or enforcement of any `params_limit`. As a result, Rack applications without an upstream body-size limit can experience unbounded memory allocation proportional to request size.\n\n## Impact\n\nAttackers can send large `application/x-www-form-urlencoded` bodies to consume process memory, causing slowdowns or termination by the operating system (OOM). The effect scales linearly with request size and concurrency. Even with parsing limits configured, the issue occurs *before* those limits are enforced.\n\n## Mitigation\n\n* Update to a patched version of Rack that enforces form parameter limits using `query_parser.bytesize_limit`, preventing unbounded reads of `application/x-www-form-urlencoded` bodies.\n* Enforce strict maximum body size at the proxy or web server layer (e.g., Nginx `client_max_body_size`, Apache `LimitRequestBody`).",
"id": "GHSA-6xw4-3v39-52mm",
"modified": "2025-10-13T15:46:17Z",
"published": "2025-10-10T17:33:35Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/rack/rack/security/advisories/GHSA-6xw4-3v39-52mm"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61919"
},
{
"type": "WEB",
"url": "https://github.com/rack/rack/commit/4e2c903991a790ee211a3021808ff4fd6fe82881"
},
{
"type": "WEB",
"url": "https://github.com/rack/rack/commit/cbd541e8a3d0c5830a3c9a30d3718ce2e124f9db"
},
{
"type": "WEB",
"url": "https://github.com/rack/rack/commit/e179614c4a653283286f5f046428cbb85f21146f"
},
{
"type": "PACKAGE",
"url": "https://github.com/rack/rack"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-61919.yml"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Rack is vulnerable to a memory-exhaustion DoS through unbounded URL-encoded body parsing"
}
GHSA-6XWM-5JC9-WW35
Vulnerability from github – Published: 2025-01-14 18:32 – Updated: 2025-01-14 18:32Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability
{
"affected": [],
"aliases": [
"CVE-2025-21270"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-14T18:15:46Z",
"severity": "HIGH"
},
"details": "Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability",
"id": "GHSA-6xwm-5jc9-ww35",
"modified": "2025-01-14T18:32:03Z",
"published": "2025-01-14T18:32:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21270"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21270"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-7233-CPFF-XW5J
Vulnerability from github – Published: 2022-05-24 17:31 – Updated: 2023-08-16 18:30A vulnerability in the OSPF Version 2 (OSPFv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incomplete input validation when the affected software processes certain OSPFv2 packets with Link-Local Signaling (LLS) data. An attacker could exploit this vulnerability by sending a malformed OSPFv2 packet to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.
{
"affected": [],
"aliases": [
"CVE-2020-3528"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-10-21T19:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the OSPF Version 2 (OSPFv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incomplete input validation when the affected software processes certain OSPFv2 packets with Link-Local Signaling (LLS) data. An attacker could exploit this vulnerability by sending a malformed OSPFv2 packet to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.",
"id": "GHSA-7233-cpff-xw5j",
"modified": "2023-08-16T18:30:19Z",
"published": "2022-05-24T17:31:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3528"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospflls-37Xy2q6r"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-7276-C97P-MP22
Vulnerability from github – Published: 2022-05-13 01:46 – Updated: 2022-05-13 01:46An issue was discovered in certain Apple products. iOS before 11 is affected. macOS before 10.13 is affected. tvOS before 11 is affected. watchOS before 4 is affected. The issue involves the "libc" component. It allows remote attackers to cause a denial of service (resource consumption) via a crafted string that is mishandled by the glob function.
{
"affected": [],
"aliases": [
"CVE-2017-7086"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-10-23T01:29:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in certain Apple products. iOS before 11 is affected. macOS before 10.13 is affected. tvOS before 11 is affected. watchOS before 4 is affected. The issue involves the \"libc\" component. It allows remote attackers to cause a denial of service (resource consumption) via a crafted string that is mishandled by the glob function.",
"id": "GHSA-7276-c97p-mp22",
"modified": "2022-05-13T01:46:51Z",
"published": "2022-05-13T01:46:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7086"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT208112"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT208113"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT208115"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT208144"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/100990"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1039427"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-727X-48VV-8CJ7
Vulnerability from github – Published: 2026-07-22 00:32 – Updated: 2026-07-22 00:32Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Exponential Data Expansion (CAPEC-197). An authenticated user may submit a specially crafted query to the ES|QL engine that causes exponential CPU consumption during query evaluation. Because the resource exhaustion persists beyond query completion, repeated requests can fully exhaust the available query worker resources, rendering ES|QL queries unavailable until the node is restarted.
{
"affected": [],
"aliases": [
"CVE-2026-63263"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-22T00:17:31Z",
"severity": "MODERATE"
},
"details": "Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Exponential Data Expansion (CAPEC-197). An authenticated user may submit a specially crafted query to the ES|QL engine that causes exponential CPU consumption during query evaluation. Because the resource exhaustion persists beyond query completion, repeated requests can fully exhaust the available query worker resources, rendering ES|QL queries unavailable until the node is restarted.",
"id": "GHSA-727x-48vv-8cj7",
"modified": "2026-07-22T00:32:36Z",
"published": "2026-07-22T00:32:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63263"
},
{
"type": "WEB",
"url": "https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-74/388577"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.
Mitigation
- Mitigation of resource exhaustion attacks requires that the target system either:
- The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
- The second solution is simply difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
- recognizes the attack and denies that user further access for a given amount of time, or
- uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Mitigation
Ensure that protocols have specific limits of scale placed on them.
Mitigation
Ensure that all failures in resource allocation place the system into a safe posture.
CAPEC-147: XML Ping of the Death
An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
CAPEC-227: Sustained Client Engagement
An adversary attempts to deny legitimate users access to a resource by continually engaging a specific resource in an attempt to keep the resource tied up as long as possible. The adversary's primary goal is not to crash or flood the target, which would alert defenders; rather it is to repeatedly perform actions or abuse algorithmic flaws such that a given resource is tied up and not available to a legitimate user. By carefully crafting a requests that keep the resource engaged through what is seemingly benign requests, legitimate users are limited or completely denied access to the resource.
CAPEC-492: Regular Expression Exponential Blowup
An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.