CVE-2026-27576 json
OpenClaw: ACP prompt-size checks missing in local stdio bridge could reduce responsiveness with very large inputs
published 2026-02-20 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-7710 , GHSA-cxpw-2g23-2vgw
- cvss
- 4.0
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
OpenClaw is a personal AI assistant. In versions 2026.2.17 and below, the ACP bridge accepts very large prompt text blocks and can assemble oversized prompt payloads before forwarding them to chat.send. Because ACP runs over local stdio, this mainly affects local ACP clients (for example IDE integrations) that send unusually large inputs. This issue has been fixed in version 2026.2.19.
Patch / fix
- npm openclaw 2026.2.19
- openclaw openclaw 2026.2.19
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| CNA | 4.0 | 4.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 4.0 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openclaw | <2026.2.19 |
2026.2.19 |
Affected products
- openclaw openclaw
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
github.com
/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4dd0b9c
web, patch
-
github.com
/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d2ba68
web, patch
-
github.com
/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea8655654a
web, patch
-
github.com
/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgw
web, vendor-advisory
-
github.com
/openclaw/openclaw/releases/tag/v2026.2.19
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-27576
advisory
-
github.com
/openclaw/openclaw
package
Sources
- CVE List CVE-2026-27576
- GitHub Advisory GHSA-cxpw-2g23-2vgw
- NVD CVE-2026-27576
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.