{"items":[{"id":"NVI-00018664","kind":"vulnerability","title":"Prometheus: Remote read endpoint allows denial of service via crafted snappy payload","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-8rm2-7qqf-34qm","CVE-2026-42154"],"plain_summary":"GitHub lists this reviewed advisory for github.com/prometheus/prometheus, github.com/prometheus/prometheus, github.com/prometheus/prometheus. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-4d1e8002d1bc4939e66edc131a57a514"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-08T16:22:15.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-4d1e8002d1bc4939e66edc131a57a514"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-4d1e8002d1bc4939e66edc131a57a514","url":"https://github.com/advisories/GHSA-8rm2-7qqf-34qm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-8rm2-7qqf-34qm","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:52:42.537Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4d1e8002d1bc4939e66edc131a57a514"],"technology":"github.com/prometheus/prometheus","known_exclusions":[],"conditions_summary":"### Impact\n\nThe remote read endpoint (`/api/v1/read`) does not validate the declared decoded length in a snappy-compressed request body before allocating memory.\nAn unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nFixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later.\n\n### Workarounds\nUser who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.","public_affected_ranges":[">= 0.306.0, < 0.311.3"]},{"certainty":"source_listed","source_ids":["sr-4d1e8002d1bc4939e66edc131a57a514"],"technology":"github.com/prometheus/prometheus","known_exclusions":[],"conditions_summary":"### Impact\n\nThe remote read endpoint (`/api/v1/read`) does not validate the declared decoded length in a snappy-compressed request body before allocating memory.\nAn unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nFixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later.\n\n### Workarounds\nUser who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.","public_affected_ranges":["< 0.305.2"]},{"certainty":"source_listed","source_ids":["sr-4d1e8002d1bc4939e66edc131a57a514"],"technology":"github.com/prometheus/prometheus","known_exclusions":[],"conditions_summary":"### Impact\n\nThe remote read endpoint (`/api/v1/read`) does not validate the declared decoded length in a snappy-compressed request body before allocating memory.\nAn unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nFixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later.\n\n### Workarounds\nUser who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.","public_affected_ranges":[">= 1.0.0-rc.0, <= 2.5.0"]}],"null_published_at":"2026-11-07T07:07:42.452Z","source_updated_at":"2026-06-08T16:22:15.000Z","source_disclosed_at":"2026-05-05T19:34:05.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-07T00:52:42.537Z"}],"next_cursor":null,"snapshot_revision":"42594"}