CVEReports
CVEReports

Automated vulnerability intelligence platform. Comprehensive reports for high-severity CVEs generated by AI.

Product

  • Home
  • Sitemap
  • RSS Feed

Company

  • About
  • Contact
  • Privacy Policy
  • Terms of Service

© 2026 CVEReports. All rights reserved.

Made with love by Amit Schendel & Alon Barad



CVE-2025-68131

Oversharing is Caring: The Persistent Memory of CVE-2025-68131

Alon Barad
Alon Barad
Software Engineer

Jan 1, 2026·5 min read·31 visits

Executive Summary (TL;DR)

If you reuse a `CBORDecoder` instance to process messages from different users, the decoder remembers 'shareable' values (Tag 28) from the first user. A second user can reference those values (Tag 29) to extract secrets, creating a cross-context information leak.

A logic flaw in the popular Python `cbor2` library allows sensitive data from one decoding session to persist and bleed into subsequent sessions due to improper state management of the 'Value Sharing' feature.

Official Patches

PyPIOfficial release containing the fix.
GitHubRelease notes for version 5.8.0.

Fix Analysis (1)

Technical Appendix

CVSS Score
4.0/ 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L
EPSS Probability
0.04%
Top 100% most exploited

Affected Systems

Python applications using cbor2 < 5.8.0RPC frameworks relying on cbor2IoT data collectors using CBOR for telemetry

Affected Versions Detail

Product
Affected Versions
Fixed Version
cbor2
agronholm
>= 3.0.0, < 5.8.05.8.0
AttributeDetail
CWECWE-212 (Improper Removal of Sensitive Information)
Attack VectorNetwork
CVSS v4.04.0 (Medium)
Exploit StatusPoC Available
Componentcbor2 Library
Patch Date2024-02-05

MITRE ATT&CK Mapping

T1557Adversary-in-the-Middle
Credential Access
T1005Data from Local System
Collection
CWE-212
Improper Removal of Sensitive Information Before Storage or Transfer

Known Exploits & Detection

GitHub Security AdvisoryProof of concept demonstrating cross-decoding state pollution.

Vulnerability Timeline

Patch Released (v5.8.0)
2024-02-05
Advisory Published
2024-02-06

References & Sources

  • [1]CBOR Specification (RFC 8949)
  • [2]cbor2 GitHub Repository

Attack Flow Diagram

Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.

More Reports

•about 22 hours ago•CVE-2026-63462
7.5

CVE-2026-63462: Unauthenticated Stack Overflow Denial of Service in Unleash Server

An unauthenticated remote denial of service vulnerability exists in the Unleash feature management platform. By submitting a crafted JSON payload containing deeply nested structures to an OpenAPI-validated endpoint, an attacker can trigger uncontrolled recursion within the error formatting module. This leads to a call-stack exhaustion (RangeError: Maximum call stack size exceeded) inside the Node.js runtime, causing the service to crash immediately without recovery.

Alon Barad
Alon Barad
8 views•6 min read
•about 23 hours ago•CVE-2026-63004
5.5

CVE-2026-63004: Server-Side Request Forgery in Unleash Addon and Integration Subsystem

CVE-2026-63004 is a server-side request forgery (SSRF) vulnerability in the Unleash feature management platform. Authenticated administrators with CREATE_ADDON or UPDATE_ADDON privileges can exploit this vulnerability to initiate requests to loopback addresses, private networks, and cloud metadata endpoints, potentially leading to information disclosure and credential extraction.

Amit Schendel
Amit Schendel
7 views•8 min read
•1 day ago•CVE-2026-63466
4.1

CVE-2026-63466: Process-Wide Security Degradation via Global Module Mutation in Unleash

Prior to version 8.0.3, Unleash's Markdown event formatter directly mutated the global template-escaping function of the shared mustache Node.js module, resulting in a process-wide security degradation where HTML/Markdown escaping was permanently disabled for the application lifetime.

Alon Barad
Alon Barad
3 views•6 min read
•1 day ago•CVE-2026-76904
9.8

CVE-2026-76904: Unauthenticated SQL Injection in GeoTools PostGIS DataStore Component

A critical SQL injection vulnerability exists in the GeoTools open-source Java library. This vulnerability is situated within the post-processing phase of OGC Filter conversion inside the PostGIS DataStore module. Specifically, the `jsonArrayContains` function does not validate or sanitize its arguments before constructing PostgreSQL SQL/JSON path evaluation queries. An unauthenticated remote attacker can exploit this weakness by submitting crafted filters via standard OGC services like WFS or WMS to execute arbitrary SQL commands on the underlying database system.

Alon Barad
Alon Barad
8 views•5 min read
•1 day ago•CVE-2026-61824
8.2

CVE-2026-61824: High-Severity Cross-Site Scripting (XSS) via Unsanitized Site Extractors in Defuddle

CVE-2026-61824 is a high-severity Cross-Site Scripting (XSS) vulnerability in kepano/defuddle before version 0.19.1. Custom site extractors for platforms such as X/Twitter, Substack, and YouTube constructed HTML representations via template string interpolation without output escaping. This allowed malicious pages to bypass standard parser sanitization routines and execute arbitrary JavaScript.

Amit Schendel
Amit Schendel
5 views•7 min read
•1 day ago•CVE-2026-63421
7.5

CVE-2026-63421: Query Limit Bypass via Negative Integer Input in KeystoneJS core resolvers

A high-severity vulnerability exists in KeystoneJS, a popular Node.js CMS and GraphQL framework, where the query resolution engine fails to validate signed negative integers within the pagination subsystem. Unauthenticated remote attackers can leverage this flaw to bypass the 'graphql.maxTake' safety boundary. By sending large negative values in the 'take' query parameter, the underlying Prisma ORM interprets the value as an instruction to fetch rows from the end of the collection, allowing malicious actors to bypass pagination limits, trigger database resource exhaustion, and execute application-level Denial of Service (DoS) attacks.

Alon Barad
Alon Barad
5 views•6 min read