CVE-2022-2835 coreDNS vulnerable to Improper Restriction of Communication Channel to Intended Endpoints
Attackers can reroute internal service calls via FQDN manipulation, potentially accessing internal resources or bypassing network controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-2835?
CVE-2022-2835 is a medium-severity server-side request forgery vulnerability in coreDNS, published on 3 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in coreDNS. This flaw allows a malicious user to reroute internal calls to some internal services that were accessed by the FQDN in a format of <service>.<namespace>.svc.
Weakness: CWE-923
Which versions are affected by CVE-2022-2835?
2 open source packages ship an affected version, including github.com/coredns/coredns. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/coredns/coredns Go | All versions to 1.9.3 | None |
github.com/coredns/coredns Go | All versions to 1.9.3 | None |
Products include Coredns.io Coredns.
How do I fix CVE-2022-2835?
No fix has been published for CVE-2022-2835 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2022-2835 being exploited?
There is no known exploitation of CVE-2022-2835 in the wild and no public exploit code.
Other vulnerabilities in coreDNS
- CVE-2026-32934 CoreDNS DNS-over-QUIC unbounded goroutine growth leads to denial of service
- CVE-2026-32936 CoreDNS DoH GET path missing size validation causes CPU and memory amplification
- CVE-2026-33190 CoreDNS TSIG authentication bypass on encrypted DNS transports
- CVE-2026-33489 CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison
- CVE-2026-35579 CoreDNS TSIG authentication bypass on gRPC, QUIC, DoH, and DoH3 transports
Sources
Also known as GHSA-ch7v-37xg-75ph.