Timing side-channel in RSA PKCS#1 v1.5 decryption in Oberon PSA Crypto
Priority LOW 25CWE-208Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-208.
Summary
Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 2.1.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00091 0th percentileScored 2026-11-07
Fix Fixed Oberon PSA Crypto (Oberon microsystems AG): 2.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Oberon microsystems AG | Oberon PSA Crypto | 1.0.0 to before 2.1.1 | 2.1.1 | Patch available | CNA |
- Oberon PSA Crypto VendorOberon microsystems AG Affected 1.0.0 to before 2.1.1 Fixed in 2.1.1 Patch available CNA
Remediation
- Fix · CNA Oberon PSA Crypto (Oberon microsystems AG) Fixed in 2.1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-16459
- 2026-10-03 Alias added: GHSA-f34q-f47h-v25c
References
More Oberon microsystems AG vulnerabilities
- TI-2026-13752 Timing side-channel in RSA PKCS#1 v1.5 decryption in ocrypto CVSS 4.0MEDIUM 5.9
- TI-2025-06725 Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in Oberon PSA Crypto library CVSS 4.0MEDIUM 5.9
- TI-2025-06433 Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library CVSS 4.0MEDIUM 5.9
- TI-2025-08313 Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto CVSS 4.0LOW 2.3
Sources
- CVE-2026-16459 · CVE Program
- CVE-2026-16459 · NVD
- FIRST EPSS
- GHSA-f34q-f47h-v25c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences