CVE-2026-35633
OpenClaw: Remote media error responses could trigger unbounded memory allocation before failure
Description
## Summary Remote media HTTP error bodies were read without a hard size cap before failure handling, allowing unbounded allocation on error responses. ## Affected Packages / Versions - Package: `openclaw` (npm) - Affected: < 2026.3.22 - Fixed: >= 2026.3.22 - Latest released tag checked: `v2026.3.23-2` (`630f1479c44f78484dfa21bb407cbe6f171dac87`) - Latest published npm version checked: `2026.3.23-2` ## Fix Commit(s) - `81445a901091a5d27ef0b56fceedbe4724566438` ## Release Status The fix shipped in `v2026.3.22` and remains present in `v2026.3.23` and `v2026.3.23-2`. ## Code-Level Confirmation - src/media/fetch.ts now routes non-2xx failures through bounded prefix reads instead of buffering the whole error body. - src/media/read-response-with-limit.ts enforces capped reads and truncates oversized snippets before surfacing failure text. OpenClaw thanks @YLChen-007 for reporting.
How to fix CVE-2026-35633
To remediate CVE-2026-35633, upgrade the affected package to a fixed version below.
- —upgrade to 2026.3.22 or later
Is CVE-2026-35633 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2026.3.22
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |