Vulnerability · Published May 26, 2026 · Assigned by GitHub_M

CVE-2026-44985Dozzle: Cross-Site WebSocket Hijacking (CSWSH) on exec/attach endpoints bypasses authentication

High 8.7

In plain English

A high-severity security flaw in dozzle from amir20. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.2%top 88.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Dozzle is a realtime log viewer for docker containers. Prior to 10.5.2, he WebSocket upgrader for the /exec and /attach endpoints uses CheckOrigin: func(r *http.Request) bool { return true }, accepting upgrade requests from any origin. Combined with the JWT cookie using SameSite: Lax, this enables Cross-Site WebSocket Hijacking (CSWSH). An attacker hosting a page on a same-site origin (e.g., a sibling subdomain, or another service on localhost) can initiate a WebSocket connection to the exec endpoint that carries the victim's valid JWT cookie, gaining interactive shell access in any container the victim is authorized to access. This vulnerability is fixed in 10.5.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/amir20/dozzle	no fix listed	GHSA-j643-x8pv-8m67
Go	github.com/amir20/dozzle	no fix listed	GO-2026-5449

Affected products (as reported)

Vendor	Product	Versions
amir20	dozzle	< 10.5.2

Weakness: CWE-346 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/amir20/dozzle/security/advisories/GHSA-j643-x8pv-8m67 x_refsource_CONFIRM
https://github.com/amir20/dozzle/releases/tag/v10.5.2 x_refsource_MISC