Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-4rj2-gpmh-qq5x
Advisory ID github_osv/GHSA-4rj2-gpmh-qq5x
Aliases CVE-2026-28446
Summary OpenClaw has an inbound allowlist policy bypass in voice-call extension (empty caller ID + suffix matching) ### Summary An authentication bypass in the optional `voice-call` extension/plugin allowed unapproved or anonymous callers to reach the voice-call agent when inbound policy was set to `allowlist` or `pairing`. Deployments that do not install/enable the `voice-call` extension are not affected. ### Affected Packages / Versions - `openclaw` (npm): `<= 2026.2.1` - Fixed in: `>= 2026.2.2` ### Details In affected versions (for example `2026.2.1`), the inbound allowlist check in `extensions/voice-call/src/manager.ts` used suffix-based matching and accepted empty caller IDs after normalization. This allowed two bypasses: 1. Missing/empty `from` values normalized to an empty string, which caused the allowlist predicate to evaluate as allowed. 2. Suffix-based matching meant any caller number whose digits ended with an allowlisted number would be accepted. ### Proof Of Concept 1. Configure the voice-call extension with `inboundPolicy: allowlist` and `allowFrom: ["+15550001234"]`. 2. Place/trigger an inbound call with missing/empty caller ID (provider-dependent; for example anonymous/restricted caller). The call is accepted. 3. Place a call from a number whose E.164 digits end with `15550001234` (for example `+99915550001234`). The call is accepted. ### Impact Only operators who install/enable the optional `voice-call` extension and use `inboundPolicy=allowlist` or `pairing` could have inbound access controls bypassed, potentially allowing unauthorized callers to reach auto-response and tool execution. ### Fix The fix hardens inbound policy handling: - Reject inbound calls when caller ID is missing. - Require strict equality when comparing normalized caller IDs against the allowlist (no suffix/prefix matching). - Add regression tests for missing caller ID, anonymous caller ID, and suffix-collision cases. Fix commit(s): - `f8dfd034f5d9235c5485f492a9e4ccc114e97fdb` Thanks @simecek for reporting.
Status Published
Exploitability 0.5
Weighted Severity 8.5
Risk 4.2
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-287 Improper Authentication
System Score Found at
cvssv3.1 9.4 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-4rj2-gpmh-qq5x/GHSA-4rj2-gpmh-qq5x.json
cvssv4 9.2 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-4rj2-gpmh-qq5x/GHSA-4rj2-gpmh-qq5x.json
generic_textual CRITICAL
Reference id Reference type URL
https://github.com/openclaw/openclaw
https://github.com/openclaw/openclaw/commit/f8dfd034f5d9235c5485f492a9e4ccc114e97fdb
https://github.com/openclaw/openclaw/releases/tag/v2026.2.2
https://www.vulncheck.com/advisories/openclaw-inbound-allowlist-policy-bypass-in-voice-call-extension-via-empty-caller-id
CVE-2026-28446 https://nvd.nist.gov/vuln/detail/CVE-2026-28446
GHSA-4rj2-gpmh-qq5x https://github.com/openclaw/openclaw/security/advisories/GHSA-4rj2-gpmh-qq5x
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-4rj2-gpmh-qq5x/GHSA-4rj2-gpmh-qq5x.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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 Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-4rj2-gpmh-qq5x/GHSA-4rj2-gpmh-qq5x.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

Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-03-11T13:40:19Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/28xxx/CVE-2026-28446.json

Source Advisory: vulnrichment/CVE-2026-28446

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'total'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]