CVE-2026-93753
Last modified
CVE-2026-93753 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks..
Description
deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| TehShrike | deepmerge | <= 4.3.1 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-93753?
How severe is CVE-2026-93753?
How do I fix CVE-2026-93753?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-93748http-cache-semantics through 4.2.0 fails to properly validat…7.5
- CVE-2026-93749source-map-js through 1.2.1 fails to validate the per-sectio…7.5
- CVE-2026-9375Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-93750http-cache-semantics through 4.2.0 contains a cache validati…5.9
- CVE-2026-93751uri-js through 4.4.1 contains an improper UTF-8 decoding vul…6.5
- CVE-2026-93752CSSOM through 0.5.0 contains a denial of service vulnerabili…7.5
- CVE-2026-93758An insecure direct object reference in the nested attributes…8.1
- CVE-2026-93759Mongoid does not neutralize a string-typed query criterion s…8.6
- CVE-2026-9376A vulnerability was determined in JPress up to 1.0.3. The af…6.3
- CVE-2026-93760Mongoid does not restrict which query operators may come fro…8.2
- CVE-2026-93761An inefficient regular expression complexity issue in the in…7.5
- CVE-2026-93762Mongoid contains an unsafe reflection weakness in the query …9.8
Are you affected by CVE-2026-93753?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST