How exploitable is this vulnerability in practice?

Exploitability depends on how the truncated hash is used. If systems treat the 32-character value as a full-strength SHA-256 digest for integrity, uniqueness, or access control, the weakened representation can make it easier to find collisions or bypass checks. If the value is only used as a non-security identifier, the impact may be limited.

Does an attacker need direct access to Jenkins or Jervis to exploit this?

Not necessarily. An attacker mainly needs the ability to influence or observe data whose truncated hash is used in a security-sensitive context. This might occur through normal inputs to CI/CD pipelines, artifact naming, or configuration data that Jervis processes.

What is the safest general fix pattern for this type of issue?

Ensure that the full output of cryptographic primitives is preserved and correctly encoded. For SHA-256, always handle 32 bytes of output and represent it as 64 hex characters (or an equivalent full-length encoding such as base64), and enforce this via tests and validation checks.

Severity:

HIGH RISK

(7.5)

Cryptographic Implementation Error (CWE-327) in Jervis SHA-256 Hex Padding

CVE-2025-68702

Published:

Jan 13, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Cryptographic Weakness

CWE:

CWE-327

Impact:

Weakened cryptographic integrity and possible validation bypass

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Cryptographic Weakness

CWE:

CWE-327

Impact:

Weakened cryptographic integrity and possible validation bypass

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Cryptographic Implementation Error (CWE-327) in Jervis SHA-256 Hex Padding

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare