CVE-2026-26309
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, an off-by-one write in Envoy::JsonEscaper::escapeString() can corrupt std::string null-termination, causing undefined behavior and potentially leading to crashes or out-of-bounds reads when the resulting string is later treated as a C-string. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| envoyproxy | envoy | >= 1.37.0, < 1.37.1 | affected |
| envoyproxy | envoy | >= 1.36.0, < 1.36.5 | affected |
| envoyproxy | envoy | >= 1.35.0, < 1.35.9 | affected |
| envoyproxy | envoy | < 1.34.13 | affected |
Weaknesses
- CWE-193: CWE-193: Off-by-one Error
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
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