Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-v8cg-4474-49v8
Advisory ID github_osv/GHSA-v8cg-4474-49v8
Aliases CVE-2026-32895
Summary OpenClaw: Slack system events bypass sender authorization in member and message subtype handlers ### Summary Slack `member_*` and `message` subtype system events (`message_changed`, `message_deleted`, `thread_broadcast`) were not consistently enforcing sender authorization before enqueueing system events. ### Affected Packages / Versions - Package: `openclaw` (npm) - Latest published version: `2026.2.25` - Affected range: `<= 2026.2.25` - Planned patched version: `2026.2.26` (pre-set for publish-readiness) ### Technical Details Slack system-event handlers in `src/slack/monitor/events/members.ts` and `src/slack/monitor/events/messages.ts` enqueued events after channel checks without shared sender authorization. Deployments relying on Slack DM allowlists (`dmPolicy` / `allowFrom`) or per-channel `users` allowlists could receive unauthorized system-event ingress from non-allowlisted senders. The fix routes those handlers through `authorizeAndResolveSlackSystemEventContext(...)` and fails closed when message subtype sender identity cannot be resolved. ### Fix Commit(s) - `3d30ba18a2aba1e1b302e77ff33145c3b06c01c8` ### Release Process Note `patched_versions` is pre-set to `>= 2026.2.26` so once npm `2026.2.26` is published, this advisory can be published without further field edits. Thanks @tdjackey for reporting.
Status Published
Exploitability 0.5
Weighted Severity 4.9
Risk 2.5
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-863 Incorrect Authorization
System Score Found at
cvssv3.1 5.4 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-v8cg-4474-49v8/GHSA-v8cg-4474-49v8.json
cvssv4 5.3 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-v8cg-4474-49v8/GHSA-v8cg-4474-49v8.json
generic_textual MODERATE
Reference id Reference type URL
https://github.com/openclaw/openclaw
3d30ba18a2aba1e1b302e77ff33145c3b06c01c8 Other https://github.com/openclaw/openclaw/commit/3d30ba18a2aba1e1b302e77ff33145c3b06c01c8
CVE-2026-32895 https://nvd.nist.gov/vuln/detail/CVE-2026-32895
GHSA-v8cg-4474-49v8 Advisory https://github.com/openclaw/openclaw/security/advisories/GHSA-v8cg-4474-49v8
openclaw-sender-authorization-bypass-in-slack-system-event-handlers Advisory https://www.vulncheck.com/advisories/openclaw-sender-authorization-bypass-in-slack-system-event-handlers
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:L/UI:N/S:U/C:L/I:L/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-v8cg-4474-49v8/GHSA-v8cg-4474-49v8.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:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-v8cg-4474-49v8/GHSA-v8cg-4474-49v8.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:N/T:P/P:M/B:A/M:M/D:T/2026-03-23T18:44:56Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/32xxx/CVE-2026-32895.json

Source Advisory: vulnrichment/CVE-2026-32895

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]