CVE-2025-68113

ALTCHA is privacy-first software for captcha and bot protection. A cryptographic semantic binding flaw in ALTCHA libraries allows challenge payload splicing, which may enable replay attacks. The HMAC signature does not unambiguously bind challenge parameters to the nonce, allowing an attacker to...

CVE-2025-68113 ALTCHA Proof-of-Work Vulnerable to Challenge Splicing and Replay

ALTCHA is privacy-first software for captcha and bot protection. A cryptographic semantic binding flaw in ALTCHA libraries allows challenge payload splicing, which may enable replay attacks. The HMAC signature does not unambiguously bind challenge parameters to the nonce, allowing an attacker to...

EUVD-2025-203484

ALTCHA is privacy-first software for captcha and bot protection. A cryptographic semantic binding flaw in ALTCHA libraries allows challenge payload splicing, which may enable replay attacks. The HMAC signature does not unambiguously bind challenge parameters to the nonce, allowing an attacker to...

exordos-core (>=0.0.7 <=0.1.1), genesis-core (>=0.0.2 <=0.0.6) +3 more potentially affected by CVE-2025-68113 via altcha (=0.2.0)

altcha PYPI version =0.2.0 is affected by a known vulnerability. The following packages have a transitive dependency on altcha and may be impacted: - exordos-core =0.0.7, =0.0.2, =5.11.0, =0.1.0, =0.12.0 - wlhosted =2024.11.0 Source cves: CVE-2025-68113 Source advisory: OSV:GHSA-6GVQ-JCMP-8959...

@levo-so/react (>=0.1.15 <=0.1.43), @levo-so/react-collection (>=0.0.1 <=0.1.86) +2 more potentially affected by CVE-2025-65849 via altcha (>=1.0.7 <=2.0.2)

altcha NPM version =1.0.7, =0.1.15, =0.0.1, =0.1.91, =0.0.23, =0.0.34 Source cves: CVE-2025-65849 Source advisory: SNYK:JS-ALTCHA-14236435...