# Redpanda v26.1.9

- Product: Redpanda (https://whatsnew.fyi/product/redpanda)
- Vendor: Redpanda Data
- Date: 2026-05-22
- Version: v26.1.9
- Original notes: https://github.com/redpanda-data/redpanda/releases/tag/v26.1.9
- Permalink: https://whatsnew.fyi/product/redpanda/releases/v26.1.9

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Allow combining aws_sigv4 Iceberg REST catalog authentication with the sts cloud credentials source
- **fixed** — Correctly decode variable-length Avro decimal payloads on the ingest path
- **fixed** — Fix corruption of negative decimal partition values in Iceberg manifests for decimal columns whose precision does not require 16 bytes
- **fixed** — Fix parsing of Iceberg table metadata whose sort orders use the spec-canonical singular source-id field
- **fixed** — Fix tiered storage I/O remaining throttled at the previously-configured rate after cloud_storage_max_throughput_per_shard was unset
- **fixed** — Fix raft followers across high-RTT links from establishing connections long enough to receive heartbeat request replies
- **fixed** — Fix double metric registration when sts credentials were used for both iceberg and tiered_storage systems
- **added** — Backport features_auto_finalization cluster configuration option to allow opting out of automatic upgrade finalization

##### Bug Fixes
* Allow combining `aws_sigv4` Iceberg REST catalog authentication with the `sts` cloud credentials source. by @nvartolomei in [#30553](https://github.com/redpanda-data/redpanda/pull/30553)
* Correctly decode variable-length Avro `decimal` payloads on the ingest path. by @nvartolomei in [#30517](https://github.com/redpanda-data/redpanda/pull/30517)
* Fix corruption of negative decimal partition values in Iceberg manifests for decimal columns whose precision does not require 16
bytes (e.g. `decimal(10,2)`). by @nvartolomei in [#30517](https://github.com/redpanda-data/redpanda/pull/30517)
* Fix parsing of Iceberg table metadata whose sort orders use the spec-canonical singular `source-id` field (e.g. metadata produced by Unity Catalog). by @mmaslankaprv in [#30477](https://github.com/redpanda-data/redpanda/pull/30477)
* Fix tiered storage I/O remaining throttled at the previously-configured rate after `cloud_storage_max_throughput_per_shard` was unset. by @nvartolomei in [#30473](https://github.com/redpanda-data/redpanda/pull/30473)
* Fixes an issue that prevented raft followers across high-RTT links from establishing connections long enough to receive heartbeat request replies.  by @ballard26 in [#30549](https://github.com/redpanda-data/redpanda/pull/30549)
* [#30502](https://github.com/redpanda-data/redpanda/issues/30502) Fixes a bug in which a double metric registration could occur when `sts` credentials were used for both `iceberg` and `tiered_storage` systems. by @WillemKauf in [#30503](https://github.com/redpanda-data/redpanda/pull/30503)

##### Improvements
* Backport `features_auto_finalization` cluster configuration option to allow opting out of automatic upgrade finalization before upgrading to v26.2. by @dotnwat in [#30460](https://github.com/redpanda-data/redpanda/pull/30460)
* PR [#30507](https://github.com/redpanda-data/redpanda/pull/30507) cloud_topics/l1: fix UB in db_domain_manager error-logging paths by @Lazin
* PR [#30509](https://github.com/redpanda-data/redpanda/pull/30509) `storage`: don't override with `shard_local_cfg()` in `ntp_config` helpers by @WillemKauf
* PR [#30527](https://github.com/redpanda-data/redpanda/pull/30527) `cluster`: fix enterprise validation for `iceberg` enablement by @WillemKauf
* PR [#30540](https://github.com/redpanda-data/redpanda/pull/30540) `ct/l1`: guard `stop_collecting_logs()` on `local_is_initialized()` by @WillemKauf
* PR [#30542](https://github.com/redpanda-data/redpanda/pull/30542) rpk: bump Go to 1.26.3, x/net to v0.54.0 (Snyk findings) by @twmb

**Full Changelog**: https://github.com/redpanda-data/redpanda/compare/v26.1.8...v26.1.9