[1.0] [CVE-2026-54428] Bump httpclient5 to 5.6.2 (#462) - #468
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### Part of elastic/security#13046 Also covers: - elastic/security#13045 (CVE-2026-54399) Resolves **CVE-2026-54428** (high) — HTTP/2 HPACK decoder resource exhaustion in httpcore5-h2. Bumping `httpclient5` to **5.6.2** pulls `httpcore5`/`httpcore5-h2` **5.4.3**, which also clears **CVE-2026-54399**. #### Changes - **`Jarfile` / `Jars.lock` / `vendor/jars/`**: `httpclient5` `5.5.1` → `5.6.2`; `httpcore5`/`httpcore5-h2` `5.3.6` → `5.4.3` #### Testing - Full `make test`: 690 examples, 0 failures - Scanner A/B: ### Scanner A/B (`CVE-2026-54428` / `CVE-2026-54399`) | Tool | Before | After | |------|--------|-------| | Trivy | n/a (DB gap) | n/a | | Snyk | reported | clear | Made with [Cursor](https://cursor.com) Co-authored-by: Cursor <cursoragent@cursor.com>
Jan-Kazlouski-elastic
approved these changes
Aug 4, 2026
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Backports the following commits to 1.0: