Cyber Resilience

CVE-2026-103256

Exposed Creds

Public PoCExposed Creds
Published
01 October 2026
Modified
01 October 2026
CVSS Score v4 7.1
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0021 10th percentile
Risk Priority 34 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-103256 is a high-severity Insufficiently Protected Credentials (CWE-522) vulnerability. Its CVSS base score is 7.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Remote Services (T1021); ranked at the 10th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to IA-5 (Authenticator Management) and SC-28 (Protection of Information at Rest) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a credentials leak vulnerability in the Wekan and Baserow username-and-password credentials that sends unencrypted passwords to unvalidated hosts. Attackers with credential update permissions can modify the host field to receive account…

more

passwords at arbitrary hosts, bypassing domain validation controls.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1021 Remote Services Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
T1114.002 Remote Email Collection Collection
Adversaries may target an Exchange server, Office 365, or Google Workspace to collect sensitive information.
T1550.003 Pass the Ticket Lateral Movement
Adversaries may “pass the ticket” using stolen Kerberos tickets to move laterally within an environment, bypassing normal system access controls.
T1552.004 Private Keys Credential Access
Adversaries may search for private key certificate files on compromised systems for insecurely stored credentials.
T1021.002 SMB/Windows Admin Shares Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-72794Shared CWE-522
CVE-2024-51240Shared CWE-522
CVE-2023-43905Shared CWE-522
CVE-2023-33620Shared CWE-522
CVE-2023-4328Shared CWE-522
CVE-2026-71511Shared CWE-522
CVE-2023-31187Shared CWE-522
CVE-2017-9248Shared CWE-522
CVE-2023-25531Shared CWE-522
CVE-2023-41677Shared CWE-522

Affected Assets

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 1 hardening rule · 1 OS baseline
Validate
Prove the fix (OWASP ASVS)
  • V11.3.3

Mitigating Controls (NIST 800-53 r5) AI

Authenticator management requires secure generation, storage, and distribution of credentials, directly stopping insecure methods.

Protection of information at rest requires encryption or equivalent safeguards for stored credentials.

Transmission confidentiality and integrity enforcement stops credentials from being sent in plaintext or without protection.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-01 partial match
prevents

Credential management practices directly reduce insecure storage/transmission but do not guarantee encryption or transport protection.

PR.AA-03 partial match
prevents

Authentication policies can enforce stronger credential handling yet address only verification, not storage or transit protection.

PR.AA-04 partial match
prevents

Protecting identity assertions covers conveyance of credentials but is narrower than full credential lifecycle protection.

PR.DS-01 partial match
prevents

Encrypting data-at-rest fully prevents insecure credential storage while only partially satisfying the broader data-protection outcome.

PR.DS-02 partial match
prevents

Encrypting data-in-transit fully prevents interception of credentials in motion while only partially satisfying the broader data-protection outcome.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

prevents

A.5.10 only requires awareness, a topic-specific acceptable-use policy stating expected behaviours/monitoring, and procedures referencing other controls (e.g. access restrictions, marking, disposal); it performs none of the verb on CWE-522's insecure credential transmission/storage, which requires technical protections like encryption or secure channels that this governance clause does not supply.

prevents

A.5.17 mandates secure allocation, transmission, storage, hashing/encryption per 8.24, strong non-reusable passwords, immediate change of defaults/compromise, and no cleartext — directly stopping exploitation of insufficiently protected credentials with only a bounded remainder (e.g. non-password authenticators or post-storage exposure vectors outside its scope).

prevents

A.6.2 sets contractual terms, NDAs, and communicates responsibilities to personnel; it has no technical effect on how credentials are protected in transmission or storage and cannot stop exploitation of CWE-522

prevents

Regular reminders about password security and personal accountability make users less likely to store or transmit credentials in cleartext or other unprotected forms.

prevents

A.8.24's purpose, guidance (b,c), and key management mandate proper cryptography (algorithms, strength, protection of credentials in storage/transmission) per classification, which stops exploitation of insufficiently-protected credentials; remainder is bounded (e.g. non-cryptographic protections like hashing-only or non-crypto obfuscation per CWE-522 details).

prevents

A.8.5 mandates MFA, alternative strong methods, no cleartext transmission/storage of passwords, session termination, brute-force protection and secure log-on procedures that directly stop interception/retrieval of credentials even when they exist, leaving only a bounded remainder (e.g. non-password credentials or post-authentication storage outside log-on flows)

References