Advisoriesby IbisVictoriaMetricsGHSA-66jq-2c23-2xh5
VictoriaMetrics' Snappy Decoder DoS Vulnerability is Causing OOM
Fix: upgrade to 1.110.23 or later (3 fixed versions below)
Impact
Affected versions are vulnerable to DoS attacks because the snappy decoder ignored VictoriaMetrics request size limits allowing malformed blocks to trigger excessive memory use. This could lead to OOM errors and service instability. The fix enforces block-size checks based on MaxRequest limits.
Patches
Versions 1.129.1, 1.122.8, 1.110.23
Resources
- https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.129.1
- https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.122.8
- https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.110.23
Note
VictoriaMetrics' security model assumes its APIs are properly secured (e.g. via access control flags or a firewall); this advisory addresses malicious input that should not be possible under a [correctly secured](https://docs.victoriametrics.com/victoriametrics/single-server-victoriametrics/#security) deployment.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| github.com/VictoriaMetrics/VictoriaMetrics Go | >= 1.123.0, < 1.129.1 | 1.129.1 |
| >= 1.111.0, < 1.122.8 | 1.122.8 | |
| >= 1.0.0, < 1.110.23 | 1.110.23 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-770
- Also known as
- CVE-2025-65942, GO-2025-4161
- github.com/VictoriaMetrics/VictoriaMetrics/security/advisories/GHSA-66jq-2c23-2xh5
- nvd.nist.gov/vuln/detail/CVE-2025-65942
- github.com/VictoriaMetrics/VictoriaMetrics/commit/51b44afd34d2c9a392d4ebedeeb5b4a7f5beca24
- github.com/VictoriaMetrics/VictoriaMetrics
- github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.110.23
- github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.122.8
- github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.129.1