CVE-2026-48497 json
Envoy: Abnormal process termination in DNS UDP filter
published 2026-06-26 4 mo ago modified 2026-10-25 14 d ago also BIT-envoy-2026-48497 , EUVD-2026-39821 , GHSA-j6g2-wf95-q66q
- 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 35%
- public exploits
- 0
- none known
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, in cases where UDP DNS filter is configured with local resolution containing a name with the length of 255 octets or remote resolution for a name of 255 octets long can complete successfully, a query with such name will result in abnormal process termination. The abnormal process termination is triggered by an invalid runtime precondition that the query name is strictly less than 255 octets, contradicting DNS specification rfc1035#section-2.3.4 that the name can be 255 or less octets. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
Patch / fix
- bitnami envoy 1.35.11, 1.36.7, 1.37.3, 1.38.1
- envoyproxy envoy 1.35.11, 1.36.7, 1.37.3, 1.38.1
- istioctl openSUSE Tumbleweed 1.30.2-1.1
opensuse advisories openSUSE-SU-2026:11141-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
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 |
| 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 |
|---|---|---|---|
| bitnami | envoy | <1.35.11 >=1.36.0, <1.36.7 >=1.37.0, <1.37.3 >=1.38.0, <1.38.1 |
1.35.11 1.36.7 1.37.3 1.38.1 |
Affected products
- envoyproxy envoy
Classification
- Weakness
-
- CWE-480 Use of Incorrect Operator
References
-
github.com
/envoyproxy/envoy/security/advisories/GHSA-j6g2-wf95-q66q
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-48497
web
Sources
- CVE List CVE-2026-48497
- NVD CVE-2026-48497
- OSV BIT-envoy-2026-48497
Fencer Vulns 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.