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CVE-2026-64857— tirreno has Session Fixation in Login Authentication

Quick assessment

Affected
tirrenotechnologies tirreno
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

tirrenotechnologies tirreno是tirrenotechnologies组织的一款隐私合规管理软件。 tirrenotechnologies tirreno 0.10.0之前版本存在会话机制问题漏洞，该漏洞源于身份验证后未调用session_regenerate_id()，导致会话标识符未在登录后旋转，攻击者可能利用已固定的会话标识符获取受害者已认证会话的访问权限。

CVSS 5.3 · Medium EPSS 0.27% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
tirrenotechnologies tirreno < 0.10.0 affected
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I. Basic Information for CVE-2026-64857

Vulnerability Information
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Vulnerability Title
tirreno has Session Fixation in Login Authentication
Source: CVE Program / CVE List V5
Vulnerability Description
tirreno, a security framework, has a session fixation issue in versions prior to 0.10.0. During authentication, tirreno validates the user's credentials and establishes the authenticated session, but it does not call `session_regenerate_id()` afterward. As a result, the session identifier is not rotated on login, it stays the same before and after authentication. An attacker able to fix a known session identifier in a victim's browser (for example through a network man-in-the-middle position, or a separate cross-site scripting or subdomain cookie-injection issue) could then gain access to the victim's authenticated session. The issue is fixed in v0.10.0. The session identifier is now regenerated on successful authentication, and the previous session is destroyed. There is no configuration-level workaround.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
会话固定
Source: CVE Program / CVE List V5
Vulnerability Title
tirrenotechnologies tirreno 会话机制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
tirrenotechnologies tirreno是tirrenotechnologies组织的一款隐私合规管理软件。 tirrenotechnologies tirreno 0.10.0之前版本存在会话机制问题漏洞，该漏洞源于身份验证后未调用session_regenerate_id()，导致会话标识符未在登录后旋转，攻击者可能利用已固定的会话标识符获取受害者已认证会话的访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tirrenotechnologies tirreno < 0.10.0 -

II. Public POCs for CVE-2026-64857

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III. Intelligence Information for CVE-2026-64857

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Vendor Advisories for CVE-2026-64857 (1)

Vendor Pages for CVE-2026-64857 (1)

IV. Related Vulnerabilities

Same weakness: CWE-384

V. Comments for CVE-2026-64857

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