CVE-2026-26310 json
Crash for scoped ip address in Envoy during DNS
published 7mo ago modified 2mo ago also BIT-envoy-2026-26310 , EUVD-2026-10802 , GHSA-3cw6-2j68-868p
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
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, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
Patch / fix
- bitnami envoy 1.34.13, 1.35.9, 1.36.5, 1.37.1
- envoyproxy envoy 1.34.13, 1.35.9, 1.36.5, 1.37.1
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/envoyproxy/envoy | 1 listed version >=1.36.0, <=1.36.4 >=1.35.0, <=1.35.8 <=1.34.12 |
no fix listed |
| bitnami | envoy | <1.34.13 >=1.35.0, <1.35.9 >=1.36.0, <1.36.5 >=1.37.0, <1.37.1 |
1.34.13 1.35.9 1.36.5 1.37.1 |
Affected products
- envoyproxy envoy
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p
web, exploit, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-26310
advisory, web
-
github.com
/envoyproxy/envoy
package
Sources
- CVE List CVE-2026-26310
- GitHub Advisory GHSA-3cw6-2j68-868p
- NVD CVE-2026-26310
- OSV BIT-envoy-2026-26310
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.