Vulnerability in Libsodium
CVE-2025-69277
libsodium before ad3004e, in atypical use cases involving certain custom cryptography or untrusted data to crypto_core_ed25519_is_valid_point, mishandles checks for whether an elliptic curve point is valid because it sometimes allows points that aren't in the main cryptographic group.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (6.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Libsodium — versions 0
Weakness classification (CWE)
References
- github.com/jedisct1/libsodium/commit/ad3004ec8731730e93fcfbbc824e67eadc1c1bae
- 00f.net/2025/12/30/libsodium-vulnerability/
- news.ycombinator.com/item
- ianix.com/pub/ed25519-deployment.html
- github.com/pyca/pynacl/issues/920
- github.com/pyca/pynacl/commit/ecf41f55a3d8f1e10ce89c61c4b4d67f3f4467cf
- github.com/pyca/pynacl/commit/96314884d88d1089ff5f336dba61d7abbcddbbf7
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-69277?
- CVE-2025-69277 is a medium-severity vulnerability in Libsodium, classified under Incomplete List of Disallowed Inputs. CVSS score: 4.5/10. Published 2025-12-31.
- How severe is CVE-2025-69277?
- Medium severity. CVSS v3 base score is 4.5 out of 10.