CVE-2026-27853 is an out-of-bounds write vulnerability affecting DNSdist when custom Lua code utilizes `DNSQuestion:changeName` or `DNSResponse:changeName` methods. An unauthenticated attacker can trigger this by sending specially crafted DNS responses, potentially leading to a denial of service through a crash if the rewritten packet exceeds size limits. This vulnerability is rated Medium severity (CVSS 5.9) due to its high attack complexity and impact on availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.9.0, < 1.9.12CPE matchmatch criteria | cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:* | ||
>= 2.0.0, < 2.0.3CPE matchmatch criteria | cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.