CVE-2026-62903 json
Microsoft.Data.SqlClient Information Disclosure Vulnerability
published yesterday modified 17h ago also EUVD-2026-121568
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
Authentication bypass by capture-replay in SQL Server allows an unauthorized attacker to disclose information over a network.
Patch / fix
- Microsoft Microsoft.Data.SqlClient 6.1 6.1.7
- Microsoft Microsoft.Data.SqlClient 7.0 7.0.3
- Microsoft Microsoft.Data.SqlClient 7.1 7.1.0-preview3
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- yesterday
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C |
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
- Microsoft Microsoft.Data.SqlClient 6.1
- Microsoft Microsoft.Data.SqlClient 7.0
- Microsoft Microsoft.Data.SqlClient 7.1
Classification
- Weakness
-
- CWE-294 Authentication Bypass by Capture-replay
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-62903
vendor-advisory, patch
Sources
- CVE List CVE-2026-62903
- NVD CVE-2026-62903
Fencer Intel 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.