MEDIUM
CVE-2026-40969
CWE-209Published: April 28, 2026· Updated: Apr 30, 2026
5.3
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:13.5th
Official Description
The raw message of every server-side AuthenticationException is returned to the unauthenticated remote caller in the gRPC status description. This allows an attacker to obtain information about the authentication failure, which may be useful for further attacks.
Affected versions:
Spring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.
Technical Analysis
CVE-2026-40969 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected Vendors & Products
VMware1 product
spring grpc
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (1)
→
https://spring.io/security/cve-2026-40969Vendor Advisory
Quick Facts
CVE IDCVE-2026-40969
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-209
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedApr 28, 2026
Related CVEs (CWE-209)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-40969 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.