Insufficient Session Expiration in ByteStash API by Jordan Dalby
CVE-2026-126658

5.3MEDIUM

Key Information:

Vendor

Jordan-dalby

Status
Bytestash
Vendor
CVE Published:
11 November 2026

What is CVE-2026-126658?

ByteStash versions prior to 1.6.2 are susceptible to an insufficient session expiration vulnerability. Users with API keys can continue to access account functionalities even after account deactivation due to a lack of validation checks on the API key's associated account status. This flaw permits unauthorized actions, such as reading, creating, modifying, or deleting snippets, and utilizing various MCP tools through the API endpoints, which compromises data integrity and security.

Affected Version(s)

ByteStash 1.5.10 < 1.6.2

ByteStash 1.6.2

References

https://github.com/jordan-dalby/ByteStash/security/adviso...
vendor-advisory
https://github.com/jordan-dalby/ByteStash/commit/eb4ecdfc...
patch
https://github.com/jordan-dalby/ByteStash/releases/tag/v1...
release-notes

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Adib Farhan
Jordan Dalby
.