En resumen
- CVE-2026-74878 es una vulnerabilidad CRÍTICO (CVSS 9.8) que afecta a openssl-encrypt, openssl encrypt (jahlives).
- Probabilidad de explotación en los próximos 30 días (EPSS): 0.75%, mayor que el 54.9% de las vulnerabilidades.
- Solución: actualizar a 1.4.0 o posterior.
Description
Severity: HIGH
Summary
The TOTP brute-force rate limiter in openssl_encrypt_server/modules/pepper/totp.py at lines 47-98 uses an in-memory defaultdict(list) as a class variable.
Affected Code
class TOTPRateLimiter:
def __init__(self, ...):
self.attempts: Dict[str, List[datetime]] = defaultdict(list)
self.lockouts: Dict[str, datetime] = {}
class TOTPService:
_rate_limiter = TOTPRateLimiter() # Class variable, in-memory only
Impact
- Rate limit state is not shared across multiple server instances/workers — an attacker can distribute attempts
- All rate limit state is lost on server restart — allows immediate retry
- In multi-worker deployments, each worker has independent rate limit state
Recommended Fix
- Use Redis or the database for rate limit state storage
- Or use a shared-memory approach for multi-worker deployments
- At minimum, persist lockout state to survive restarts
Fix
Fixed in commit 2749bc0 on branch releases/1.4.x — added abstract RateLimitBackend with InMemoryBackend and DatabaseBackend implementations; defaults to DatabaseBackend when DB available.
NVD description
openssl_encrypt versions before 1.4.0 use an in-memory rate limiter for TOTP brute-force protection that is not shared across workers and is lost on server restart. Attackers can distribute authentication attempts across multiple server instances or retry immediately after a restart to bypass rate limiting protections.
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