Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-r294-2894-92j3
Advisory ID github_osv/GHSA-r294-2894-92j3
Aliases
Summary OpenClaw has stored XSS in exported session HTML viewer via markdown/raw-HTML rendering ## Summary The exported session HTML viewer allowed stored XSS when untrusted session content included raw HTML markdown tokens or unescaped metadata fields. ## Impact Opening a crafted exported HTML session could execute attacker-controlled JavaScript in the viewer context. This can expose session content in the page and enable phishing or UI spoofing in the trusted export view. ## Affected Packages / Versions - Package: `openclaw` (npm) - Affected versions: `<= 2026.2.22-2` - Patched version (released): `>= 2026.2.23` ## Technical Details The exporter rendered markdown with `marked.parse(...)` and inserted HTML via `innerHTML`, but did not override the `html` renderer token path. Raw HTML (for example `<img ... onerror=...>`) was passed through. Additional tree/header metadata fields were interpolated without escaping in the export template. ## Reproduction 1. Create a session containing content like `<img src=x onerror=alert(1)>`. 2. Export the session to HTML. 3. Open the exported file. 4. Observe script execution from injected content. ## Remediation - Added a `marked` `html(token)` renderer override that escapes raw HTML tokens. - Escaped previously unescaped tree/header metadata fields in the export template. - Added image MIME sanitization for exported data-URL image rendering. - Added regression tests for markdown/token and metadata escaping paths. ## Fix Commit(s) - `f8524ec77a3999d573e6c6b8a5055bf35c49a2e6` ## Release Process Note `patched_versions` is pre-set to the released version (`>= 2026.2.23`). This advisory now reflects released fix version `2026.2.23`. OpenClaw thanks @allsmog for reporting.
Status Published
Exploitability 0.5
Weighted Severity 4.8
Risk 2.4
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
cvssv4 5.3 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-r294-2894-92j3/GHSA-r294-2894-92j3.json
generic_textual MODERATE
Reference id Reference type URL
https://github.com/openclaw/openclaw
https://github.com/openclaw/openclaw/commit/f8524ec77a3999d573e6c6b8a5055bf35c49a2e6
https://github.com/openclaw/openclaw/security/advisories/GHSA-r294-2894-92j3
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-r294-2894-92j3/GHSA-r294-2894-92j3.json
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.