Advisory details:
github_osv / GHSA-gj9q-8w99-mp8j
| Advisory ID | github_osv/GHSA-gj9q-8w99-mp8j |
| Aliases |
CVE-2026-43529
|
| Summary | OpenClaw: TOCTOU read in exec script preflight ## Summary OpenClaw's exec script preflight validator previously validated and then read a script by mutable pathname. A local race could swap the path between validation and read, causing preflight analysis to inspect a different file identity than the one that passed the workspace boundary check. ## Affected Packages / Versions - Package: `openclaw` - Ecosystem: npm - Affected versions: `< 2026.4.10` - Patched versions: `>= 2026.4.10` ## Impact The impact is limited. This was not arbitrary full-file disclosure through the preflight error path. The validator only surfaced derived preflight content, such as a matched token, a line number, or the first non-empty JavaScript line in one branch. Exploitation also required the ability to mutate the relevant workspace path during the preflight window. Still, this was a real TOCTOU boundary bug in code that is supposed to reason about workspace-local script files before execution. A file identity that passed the initial boundary validation could differ from the identity that was later read for preflight analysis. ## Technical Details The vulnerable flow performed separate path validation and file reads in `validateScriptFileForShellBleed`. Because the read was path-based, an attacker with write access to the workspace path could race replacement of the target after validation but before preflight read. ## Fix PR #62333 replaced the check-then-read flow with a pinned safe-open/read path using the shared `readFileWithinRoot` helper. The fixed path performs boundary verification around the opened file identity and avoids relying on a mutable pathname for the final preflight read. Regression tests cover both pre-open and post-open swap windows. ## Fix Commit(s) - `b024fae9e5df43e9b69b2daebb72be3469d52e91` (`fix(exec): replace TOCTOU check-then-read with atomic pinned-fd open in script preflight [AI]`) - PR: #62333 ## Release Process Note The fix first shipped in `v2026.4.10`. Users should upgrade to `openclaw` `2026.4.10` or newer; the latest npm release already includes the fix. ## Credits Thanks to @kikayli for reporting this issue. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 1.9 |
| Risk | 0.9 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv4 | 2.1 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-gj9q-8w99-mp8j/GHSA-gj9q-8w99-mp8j.json |
| generic_textual | LOW |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| 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 |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-05T12:18:03Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/43xxx/CVE-2026-43529.json
Source Advisory: vulnrichment/CVE-2026-43529
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]