CVE-2026-81691Network attack vectorHinoki check available

Account takeover via unvalidated server URLs

Published Aug 27, 2026 · Updated Aug 27, 2026

Cleartext credential transmission in jahlives OpenSSL Encrypt before 1.4.9 allows man-in-the-middle attackers to take over keyserver accounts. The login and register_with_email functions accept arbitrary server values, including HTTP and unconfigured hosts, before sending client IDs, passwords, and JWTs. Exploitation requires a network-path position during keyserver authentication or registration; exposed credentials grant control of the victim's keyserver account.

CVSS severity8.7
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cleartext credential transmission in jahlives OpenSSL Encrypt before 1.4.9 allows man-in-the-middle attackers to take over keyserver accounts. The login and register_with_email functions accept arbitrary server values, including HTTP and unconfigured hosts, before sending client IDs, passwords, and JWTs. Exploitation requires a network-path position during keyserver authentication or registration; exposed credentials grant control of the victim's keyserver account.

The record

CVE
CVE-2026-81691
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
jahlives
Product
OpenSSL Encrypt
Classifications
CWE-319, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.4.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

jahlives · OpenSSL Encryptversion=0 <1.4.9

Published CVSS scores

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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