Monitoring system and time series database
Latest v3.13.1 on Jul 10, 2026 · 1 day after v3.5.5
This is a bugfix release for 3.13 LTS.
This release is built with Go 1.25.12 and fixes a security issue in a UI dependency.
sanitize-html to v2.17.5 to fix CVE-2026-53606. #19060This is a Long Term Support LTS release.
sanitize-html to fix a cross-site scripting vulnerability (CVE-2026-44990). #18697/assets/third-party-licenses.txt, replacing the npm_licenses.tar.bz2 archive previously shipped in release tarballs and container images. #18997--http.config.file are now resolved relative to that config file's directory instead of its parent directory. Via prometheus/common v0.69.0. #18949min() and max() duration-expression functions (experimental feature flag experimental-duration-expr) to min_of() and max_of() to avoid confusion with the min and max aggregate operators. #18687min_of(a, b) and max_of(a, b) scalar experimental functions, returning the smaller or larger of two scalar values. #18687samplesRead (and samplesReadPerStep with stats=all and the promql-per-step-stats feature flag) in the query stats response, and add the prometheus_engine_query_samples_read_total engine counter. samplesRead reflects storage I/O distinct from totalQueryableSamples, which counts samples loaded into the evaluator (and so over-counts when a sample is reused across multiple range-vector windows). #18081__convert_classic_histograms_to_nhcb__ internal label to allow per-target override of convert_classic_histograms_to_nhcb scrape configuration via relabeling. #18840storage.tsdb.chunk_encoding.floats configuration field to select float chunk encoding (xor or xor2) at runtime, independently of the --enable-feature=xor2-encoding flag. #18769__always_scrape_classic_histograms__ and __scrape_native_histograms__ internal labels to allow per-target override of the always_scrape_classic_histograms and scrape_native_histograms scrape configuration via relabeling. #18929fill_left(x) fill_right(x) as fill(x) when both fill values are equal. #18851--enable-feature=created-timestamp-zero-ingestion). #18813end was not aligned to step caused subqueries inside it to evaluate past the parent's last actual step, inflating peakSamples in the query stats and against the query.max-samples limit, and wasting storage I/O reading samples that were never used in the result. #18081@ modifier (e.g. predict_linear(metric[60s] @ T, X)) silently under-counted totalQueryableSamples for steps after step 0. #18081fill_left/fill_right producing missing samples in range queries when using group_left/group_right. #188501[5m] smoothed and similar expressions when extended range selectors are enabled. #18764smoothed instant vector selector produces no samples for a series. #18943foo offset -(5)). #18768{}. Via prometheus/common v0.69.0. #18949check healthy and check ready when --url ends with a trailing slash. #18854private_ip or public_ip field, but do have private NICs attached. #18772This release fixes multiple security issues.
/-/config endpoint. Thanks to @August829 and @Phaxma for reporting. GHSA-39j6-789q-qxvh #18650golang.org/x/net to v0.55.0 and OpenTelemetry to v1.43.0 to fix reported CVEs (GO-2026-5026, GO-2026-4918, GO-2026-4985). #18934react-router-dom, vitest, vite, postcss) to their patched versions to resolve security advisories. #18935This release contains security fixes, new features (especially around PromQL and Service Discovery), performance improvements in TSDB, Start Timestamp improvements and numerous bug fixes.
Thanks to all contributors!
rate(), irate(), increase(), and resets(). New experimental functions start(), end(), range(), and step() are introduced./-/config endpoint. Thanks to @August829 and @Phaxma for reporting. GHSA-39j6-789q-qxvh #18649st-storage flag is enabled. #18221/api/v1/status/self_metrics endpoint returning the current state of the Prometheus server's own metrics about itself as JSON. #18411outscale_sd_configs) for discovering scrape targets from the Outscale Cloud API. #18139sort, sort_by_label or sort_by_label_desc is used within range (matrix) queries, as these functions do not have effect in that context. #18498start(), end(), range(), and step() experimental functions #17877resets() function to consider start timestamp resets. Hidden behind use-start-timestamps feature flag. #18627CheckpointFromInMemorySeries option to agent.DB that enables checkpoint based on in-memory series. #17948rate(), irate(), and increase() calculations, behind a feature flag use-start-timestamps. Doesn't work together with extended range selectors anchored and smoothed. #18344st-synthesis which synthesizes unknown STs for scraped cumulative metrics. Useful when Remote Writing 2.0 with delta or Otel-based backends. #18279@st annotation in load blocks to specify per-sample start timestamps. #18360external_id field to ECS/MSK/RDS/Elasticache. #18579external_id field. #17171--header flag to query instant command, matching existing query range behaviour. #18418info() function incorrectly handling negated __name__ matchers #17932/parse_ast. #18624health_filter for Health API filtering, fixing breakage when using Catalog-only fields like ServiceTags in filter. #18479 #18499smoothed rate/increase returning zero instead of no result when all data falls strictly after the query range. #18523range() keyword in duration expressions such as foo[5m+range()]. #18623@ modifier is used. #18531prometheus_sd_refresh* and prometheus_sd_discovered_targets metrics for specific scrape jobs are deleted when the scrape job is removed. #17614--enable-feature flag description and sort feature names. #18487This release fixes mutiple security issues.
We would like to thank the following people for the responsible disclosures:
Shadowbyte (4c1dr3aper) - Charlie Lewis for the Remote-Read snappy decode vulnerability.
Brett Gervasoni for the AzureAD OAuth client_secret vulnerability.
@iiihaiii and @Ngocnn97 for the Old UI XSS vulnerability.
[SECURITY] AzureAD remote write: Fix OAuth client_secret being exposed in plaintext via /-/config endpoint. GHSA-wg65-39gg-5wfj / CVE-2026-42151 #18590
[SECURITY] Remote-read: Reject snappy-compressed requests whose declared decoded length exceeds the decode limit. GHSA-8rm2-7qqf-34qm / CVE-2026-42154 #18584
[SECURITY] UI: Fix stored XSS via unescaped le label values in old UI heatmap chart tick labels. GHSA-fw8g-cg8f-9j28 #18588
This release fixes mutiple security issues.
We would like to thank the following people for the responsible disclosures:
client_secret vulnerability.client_secret being exposed in plaintext via /-/config endpoint. GHSA-wg65-39gg-5wfj / CVE-2026-42151 #18587le label values in old UI heatmap chart tick labels. GHSA-fw8g-cg8f-9j28 #18589