CVE-2026-118986— CallBackery versions before 0.62.0 for Perl allow session cookie forgery via a signing secret generated with rand()

Quick assessment

Affected

CVE-2026-118986

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.

在 0.62.0 版本之前的 Perl 版 CallBackery 中，由于使用 rand() 生成签名密钥，攻击者可通过伪造会话 Cookie 实施攻击。用于签署会话 Cookie 的密钥由两次内置 rand() 函数调用生成，而 rand() 的种子仅为 32 位。因此，该密钥最多仅有 2^32 种可能取值；攻击者只需获取一个已签名的 Cookie，即可离线穷举所有候选密钥。一旦攻击者获取任意一个会话 Cookie，即可恢复该签名密钥，并进而为任何用户（包括管理员）伪造有效的会话 Cookie。

AI Predicted 8.8 Difficulty: Moderate Updated Oct 30, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
None	None	`< 0.62.0`	affected

Updated Oct 30, 2026

Vulnerability Information

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Vulnerability Title

CallBackery versions before 0.62.0 for Perl allow session cookie forgery via a signing secret generated with rand()

Source: CVE Program / CVE List V5

Vulnerability Description

CallBackery versions before 0.62.0 for Perl allow session cookie forgery via a signing secret generated with rand(). The secret that signs session cookies is built from two calls to the built-in rand(), which is seeded with 32 bits. The secret therefore has at most 2**32 possible values, and one signed cookie is enough to test each candidate offline. An attacker who obtains a single session cookie can recover the secret and sign cookies for any user, including an administrator.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

使用具有密码学弱点缺陷的PRNG

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
-	-	0 ~ 0.62.0	-

II. Public POCs for CVE-2026-118986

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-118986

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Other References for CVE-2026-118986 (1)

https://metacpan.org/release/OETIKER/CallBackery-0.62.0/changes release-notes

https://www.cve.org/CVERecord?id=CVE-2026-118986

IV. Related Vulnerabilities

Same weakness: CWE-338