Attackers Target Rejetto HFS Flaw That Enables Admin Session Forgery and RCE

A critical security flaw impacting Rejetto HTTP File Server HFS is witnessing active exploitation attempts, according to VulnCheck. The vulnerability in question is CVE-2026-61500 CVSS score: 9.3, a case of session forgery stemming from the use of a weak pseudo-random number generator PRNG that c...

CVE-2026-61500

CVE-2026-61500: Rejetto HFS 세션 위조를 통한 RCE CVE-2026-61500은 Rejetto HFS 3.0.0부터 3.2.0까지의 인증되지 않은 세션 위조 취약점입니다. HFS는 Koa 세션 쿠키 서명 키를 JavaScript Math.random으로 생성했고, 인증되지 않은 SRP 로그인 핸드셰이크에서 동일한 V8 PRNG의 출력을 노출했습니다. 공격자는 PRNG 상태를 재구성하고, 서명 키를 복구하고, 관리자 세션을 위조하고, 문서화된 servercode 구성 기능을 사용하여 서버 측...

ReplicatedRandom

Node MWC1616 node 폴더의 README를 참조하세요. Java LCG java.util.Random의 nextDouble로 생성된 double이 주어지면, 동일한 상태를 가진 Random을 재생성하십시오. 이 ReplicatedRandom은 원래 Random의 미래 값을 예측하는 데 사용할 수 있습니다. 예제: Random r = new Random; ReplicatedRandom rr = new ReplicatedRandom; rr.replicateStater.nextDouble;...

VulnCheck KEV: CVE-2026-61500

Rejetto HFS 3.0.0 through 3.2.0 derives its session-cookie signing key from the non-cryptographic Math.random generator and discloses outputs of the same generator to unauthenticated clients during login. A remote attacker can collect a small number of login responses, reconstruct the generator's...

AlmaLinux 9.2 [TuxCare] Security Update: nodejs / nodejs-devel / nodejs-docs / nodejs-full-i18n / etc (ALMALINUX9.2:CLSA-2025:1758102713)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2025:1758102713 advisory. - Undici is an HTTP/1.1 client. Starting in version 4.5.0 and prior to versions 5.28.5, 6.21.1, and 7.2.3, undici uses Math.random to choose...

CVE-2026-94456

Postiz generates security-sensitive credentials using Math.random instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s...

CVE-2026-94456 Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys

Postiz generates security-sensitive credentials using Math.random instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s...

CVE-2026-94456 Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys

Postiz generates security-sensitive credentials using Math.random instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s...

CVE-2026-94456 Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys

Postiz generates security-sensitive credentials using Math.random instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s...

EUVD-2026-84543

Postiz generates security-sensitive credentials using Math.random instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s...

CVE-2026-94456

The Postiz application uses the cryptographically weak Math.random() function to generate security-sensitive credentials, including OAuth access tokens , authorization codes , client secrets , organization API keys , and PKCE verifiers . Because these credentials rely on V8’s deterministic xorshi...

CVE-2026-94456: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Postiz generates security-sensitive credentials using Math.random instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s...

PT-2026-96832

Name of the Vulnerable Software and Affected Versions Postiz affected versions not specified Description Postiz uses Math.random instead of a cryptographically secure source to generate security-sensitive credentials. This affects OAuth access tokens, authorization codes, client secrets,...

CVE-2026-62862

Typebot (open-source chatbot builder), self-hosted versions ≤ 3.17.1 , is vulnerable to account takeover via brute-forcing of the passwordless email magic-link login code. The root cause is a 6-digit code generated with Math.random() (only 900,000 combinations) with a 10-minute expiry, no attempt...

CVE-2026-55086

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

EUVD-2026-62741

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

CVE-2026-55086 Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

CVE-2026-55086 Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

CVE-2026-55086

Etherpad (ep_etherpad-lite) versions prior to 3.1.0 are vulnerable to a symlink-based file overwrite via predictable temporary filenames. The ImportHandler.ts and ExportHandler.ts components derive temp-file paths from Math.random() (~32 bits of entropy), which is predictable within the same Node...

ANT-2026-110HTZ5M · jsrsasign · Cryptographically Weak PRNG / Predictable ECDSA Nonce

other high Severity Claude high · Security research firm high · Maintainer - REPORT Anthropic's analysis, sealed at approval. Disclosure to the maintainer was performed by Calif. ANT-2026-110HTZ5M: jsrsasign npm — ECDSA nonce RNG seeded entirely from Math.random in Node.js The npm wrapper at...