Cosminexus Component Container: Deserialization of Untrusted Data
CVE-2026-71374 is a critical-severity deserialization of untrusted data vulnerability in Cosminexus Component Container from Hitachi, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 11-70-03, 11-60-03, 11-20-10 as the first without the flaw, so updating Cosminexus Component Container to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.56% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Cosminexus Component Container to 11-70-03 or 11-60-03 or 11-20-10 or 11-00-13, whichever matches your release line, or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Hitachi | Cosminexus Component Container | 11-70-01 up to, but not including, 11-70-03; 11-60 up to, but not including, 11-60-03; 11-50 through 11-50-03; 11-40 through 11-40-03; 11-30 through 11-30-08; 11-20 up to, but not including, 11-20-10; 11-10 through 11-10-11; 11-00 up to, but not including, 11-00-13; and 5 more ranges | 11-70-03, 11-60-03, 11-20-10, 11-00-13, 09-87-10, 09-80-05 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (hitachi.co.jp).
Official description
Deserialization of untrusted data vulnerability in Cosminexus Component Container. This issue affects Cosminexus Component Container: from 11-70-01 before 11-70-03, from 11-60 before 11-60-03, from 11-50 through 11-50-03, from 11-40 through 11-40-03, from 11-30 through 11-30-08, from 11-20 before 11-20-10, from 11-10 through 11-10-11, from 11-00 before 11-00-13, from 09-87 before 09-87-10, from 09-80 before 09-80-05, from 09-70 before 09-70-28, from 09-50 through 09-50-22, and from 09-00 through 09-00-18.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
How developers prevent this class of flaw
- If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
- When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
- Explicitly define a final object() to prevent deserialization.
More Deserialization of Untrusted Data vulnerabilities (CWE-502)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
References
Other vulnerabilities in Cosminexus Component Container
- 9.8 Critical severity
- 9.8 Critical severity
- 7.4 High severity
Recent Deserialization of Untrusted Data vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 9.8 Critical severity
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