Cyber Resilience

CVE-2026-5086

Nerdvana Crypt\ \

Published
13 April 2026
Modified
06 May 2026
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0040 33th percentile
Risk Priority 57 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-2026-5086 is a high-severity Observable Timing Discrepancy (CWE-208) vulnerability in Nerdvana Crypt\. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Password Guessing (T1110.001); ranked at the 33th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-5086 is a vulnerability in Crypt::SecretBuffer versions before 0.019 for Perl, making it susceptible to timing attacks (CWE-208). The issue arises when the module is used for operations like storing and comparing plaintext passwords, where differences in execution timing could leak information about the secret.

Remote attackers can exploit this vulnerability with network access, low attack complexity, no privileges, and no user interaction required, as indicated by its CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). Successful exploitation enables high-impact confidentiality breaches, such as guessing passwords through observed timing discrepancies during comparisons.

The patch in Crypt::SecretBuffer version 0.019 addresses the timing attack vulnerability, with details documented in the module's Changes file available at https://metacpan.org/release/NERDVANA/Crypt-SecretBuffer-0.019/source/Changes. Additional information on the issue and remediation appears in the oss-security mailing list post at http://www.openwall.com/lists/oss-security/2026/04/13/12.

EU & UK References

Vulnerability Data

Crypt::SecretBuffer versions before 0.019 for Perl is suseceptible to timing attacks. For example, if Crypt::SecretBuffer was used to store and compare plaintext passwords, then discrepencies in timing could be used to guess the secret password.

CWE(s)
CWE-208

Related Threats

MITRE ATT&CK Enterprise Techniques

T1110.001 Password Guessing Credential Access
Adversaries with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts.
attack.mitre.org →
T1087 Account Discovery Discovery
Adversaries may attempt to get a listing of valid accounts, usernames, or email addresses on a system or within a compromised environment.
attack.mitre.org →
T1087.001 Local Account Discovery
Adversaries may attempt to get a listing of local system accounts.
attack.mitre.org →
T1087.002 Domain Account Discovery
Adversaries may attempt to get a listing of domain accounts.
attack.mitre.org →
T1087.003 Email Account Discovery
Adversaries may attempt to get a listing of email addresses and accounts.
attack.mitre.org →
T1087.004 Cloud Account Discovery
Adversaries may attempt to get a listing of cloud accounts.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-41418Shared CWE-208
CVE-2024-39329Shared CWE-208
CVE-2024-45191Shared CWE-208
CVE-2026-25597Shared CWE-208
CVE-2026-54685Shared CWE-208
CVE-2026-40972Shared CWE-208
CVE-2025-59058Shared CWE-208
CVE-2026-33006Shared CWE-208
CVE-2026-33129Shared CWE-208
CVE-2025-59350Shared CWE-208

Affected Assets

nerdvana
crypt\
\

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V11.2.4

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing can include timing analysis or side-channel test cases that reveal observable timing discrepancies.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles can mandate constant-time algorithms and side-channel resistance so timing discrepancies are never introduced.

SC-13 Cryptographic Protection partial match

Requiring approved cryptographic modules and algorithms implicitly demands implementations free of observable timing leaks.

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.PS-06 mostly match
prevents

Secure SDLC practices directly require constant-time implementations that eliminate observable timing discrepancies.

References