CVE-2026-23897 describes a Denial of Service (DoS) vulnerability in Apollo Server versions 2.0.0-3.13.0, 4.2.0-4.13.0, and 5.0.0-5.4.0 when directly using startStandaloneServer. Attackers can trigger this DoS by sending specially crafted request bodies with exotic character set encodings. With a CVSS score of 7.5 (HIGH), this vulnerability has a network attack vector, low attack complexity, and high impact on availability, but no impact on confidentiality or integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.0.0, <= 3.13.0CPE matchmatch criteria | cpe:2.3:a:apollographql:apollo_server:*:*:*:*:*:*:*:* | ||
>= 4.2.0, < 4.13.0CPE matchmatch criteria | cpe:2.3:a:apollographql:apollo_server:*:*:*:*:*:*:*:* | ||
>= 5.0.0, < 5.4.0CPE matchmatch criteria | cpe:2.3:a:apollographql:apollo_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.