- Issuer
- Let's Encrypt
- Max TLS
- TLS1.3
- Cipher
- ECDHE-ECDSA-AES256-GCM-SHA384
- Expires
- 11/24/2026 ( 21 d)
- HSTS
- Disabled
- OCSP Stapling
- Disabled
- Last scanned
- 9/10/2026, 5:50:57 AM
Report summary
securityholes.science currently holds an SSL grade of A (100/100) from CertH TLS health monitoring. The site supports TLS1.3, TLS1.2, does not enable HSTS, and its certificate is issued by Let's Encrypt — 21 days left on the certificate. CertH records daily TLS handshake probes into an auditable certificate health trend.
Good — Solid security with only minor issues — e.g. no HSTS preload or not fully leveraging TLS 1.3. The mainstream recommended grade.
securityholes.science scores higher than 79% of the 12,267 sites we grade.
Last scanned 54 days ago — this data may be stale
Full certificate & config details
- Common Name
- securityholes.science
- Key
- ec 256bit
- Sig Hash
- SHA-384
- SAN
- securityholes.science
- Fingerprint
- a14a457c48701ce36016853349c228e4d228b6802c14d0cd9715e91ae224d8a9
What’s working
- TLS 1.3 enabled
- Complete certificate chain
- No legacy TLS or weak ciphers
Score trend
Recent history
| Time | Grade | Score | Issuer |
|---|---|---|---|
| 9/10/2026, 5:50:57 AM | A | 100 | Let's Encrypt |
| 9/9/2026, 8:39:45 PM | D | 65 | — |
| 9/8/2026, 6:29:51 PM | B | 87 | Let's Encrypt |
Score change insights · Last 90 days
Net change ↑ +13-
↑
9/10/2026 +35 D → AKey strength changed
-
↓
9/9/2026 -22 B → DKey strength changed
FAQ
When does securityholes.science’s certificate expire?
securityholes.science’s certificate expires on 11/24/2026, in 21 days, issued by Let's Encrypt.
Is securityholes.science’s TLS configuration secure?
securityholes.science currently scores A (100/100). It negotiates TLS1.3, TLS1.2 and does not enable HSTS.
Why did securityholes.science’s score change?
9/10/2026: +35 points — Key strength changed