# Redpanda v26.1.16

- Product: Redpanda (https://whatsnew.fyi/product/redpanda)
- Vendor: Redpanda Data
- Date: 2026-08-13
- Version: v26.1.16
- Original notes: https://github.com/redpanda-data/redpanda/releases/tag/v26.1.16
- Permalink: https://whatsnew.fyi/product/redpanda/releases/v26.1.16

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** — Fixed a crash that could occur when removing a partition with a very large number of log segments, for example during partition rebalancing
- **fixed** — Fixed a crash where a snapshot write failing on a full disk (ENOSPC) aborted the node with a misleading assertion instead of surfacing the I/O error
- **security** — Fixed a double-free / use-after-free in c-ares query-completion handling (CVE-2026-33630)
- **fixed** — Fixed a race in the internal Kafka client where a concurrent request on a freshly established SASL connection could be sent before authentication finished, causing the broker to drop the connection
- **fixed** — Fixed rpk connect upgrade failing to determine the currently-installed Redpanda Connect version when that version has a segment of three or more digits

##### Bug Fixes
* Fixed a crash that could occur when removing a partition with a very large number of log segments, e.g. during partition rebalancing. by @pgellert in [#31505](https://github.com/redpanda-data/redpanda/pull/31505)
* Fixed a crash where a snapshot write failing on a full disk (ENOSPC) aborted the node with a misleading "snapshot writer has to be closed" assertion instead of surfacing the I/O error. by @nvartolomei in [#31186](https://github.com/redpanda-data/redpanda/pull/31186)
* Fixed a double-free / use-after-free in c-ares query-completion handling (CVE-2026-33630). by @bartoszpiekny-redpanda in [#31486](https://github.com/redpanda-data/redpanda/pull/31486)
* Fixed a race in the internal Kafka client where a concurrent request on a freshly established SASL connection could be sent before authentication finished, causing the broker to drop the connection. by @nvartolomei in [#31192](https://github.com/redpanda-data/redpanda/pull/31192)
* [#31550](https://github.com/redpanda-data/redpanda/issues/31550) `rpk connect upgrade` no longer fails to determine the currently-installed Redpanda Connect version when that version has a segment of three or more digits, which had blocked upgrading any Connect install since 4.100.0. by @JakeSCahill in [#31551](https://github.com/redpanda-data/redpanda/pull/31551)

**Full Changelog**: https://github.com/redpanda-data/redpanda/compare/v26.1.15...v26.1.16