go.etcd.io vulnerabilities

Products

• go.etcd.io/etcd 18
• go.etcd.io/etcd/client/v3 3
• go.etcd.io/etcd/client/pkg/v3 2
• go.etcd.io/etcd/server/v3 2

Latest go.etcd.io CVEs

Newest publication first

1. CVE-2026-73500 etcd: `tlsListener.acceptLoop` spawns unbounded handshake goroutines with no deadline

   Published 2026-08-12

   High·CVSS 8.7 EPSS 0.40%

   etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a network attacker who can reach an etcd TLS listener can open many TCP connections and never send a ClientHello. In client/pkg/transport/listener_tls.go, each...

2. CVE-2026-73499 etcd: Watch API authorization bypass via open-ended range requests

   Published 2026-08-12

   High·CVSS 7.1 EPSS 0.66%

   etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographic...

3. CVE-2026-44283 etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks

   Published 2026-05-14

   Medium·CVSS 4.3 EPSS 0.22%

   etcd is a distributed key-value store for the data of a distributed system. Prior to 3.4.44, 3.5.30, and 3.6.11, a vulnerability in etcd allows read access via PrevKv, or lease attachment in Put requests within transaction operations, to bypass RBAC authorization checks. An authe...

4. CVE-2026-33413 etcd: Authorization bypasses in multiple APIs

   Published 2026-03-26

   High·CVSS 8.8 EPSS 0.26%

   etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, unauthorized users may bypass authentication or authorization checks and call certain etcd functions in clusters that expose the gRPC API to untrusted or parti...

5. CVE-2026-33343 etcd: Nested etcd transactions bypass RBAC authorization checks

   Published 2026-03-26

   Medium·CVSS 6.5 EPSS 0.22%

   etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, an authenticated user with RBAC restricted permissions on key ranges can use nested transactions to bypass all key-level authorization. This allows any authent...

6. GHSA-vjg6-93fv-qv64 Etcd auth Inaccurate logging of authentication attempts for users with CN-based auth only

   Published 2024-02-03

   Unknown

   Vulnerability type Logging Detail etcd users who have no password can authenticate only through a client certificate. When such users try to authenticate into etcd using the Authenticate endpoint, errors are logged with insufficient information regarding why the authentication fa...

7. GHSA-pm3m-32r3-7mfh Etcd embed auto compaction retention negative value causing a compaction loop or a crash

   Published 2024-02-03

   Unknown

   Impact Data Validation Detail The parseCompactionRetention function in embed/etcd.go allows the retention variable value to be negative and causes the node to execute the history compaction in a loop, taking more CPU than usual and spamming logs. References Find out more on this...

8. GHSA-j86v-2vjr-fg8f Etcd Gateway TLS endpoint validation only confirms TCP reachability

   Published 2024-02-03

   Unknown

   Vulnerability type Cryptography Workarounds Refer to the gateway documentation. The vulnerability was spotted due to unclear documentation of how the gateway handles endpoints validation. Detail Secure endpoint validation is performed by the etcd gateway start command when the --...

9. GHSA-5x4g-q5rc-36jp Etcd pkg Insecure ciphers are allowed by default

   Published 2024-02-03

   Unknown

   Vulnerability type Cryptography Detail The TLS ciphers list supported by etcd contains insecure cipher suites. Users can configure the desired ciphers using the “--cipher-suites” flag, and a default list of secure cipher suites is used if empty. Workarounds By default, no action...

10. CVE-2021-28235 Etcd-io Improper Authentication vulnerability

    Published 2023-04-04

    Critical·CVSS 9.8 EPSS 1.6%

    Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.

11. GHSA-9gp7-6833-wv89 etcd having a negative value for cluster node size results in an index out-of-bound panic during service discovery

    Published 2022-10-06

    Unknown

    Vulnerability type Data Validation Detail When an etcd instance attempts to perform service discovery, if a cluster size is provided as a negative value, the etcd instance will panic without recovery. References Find out more on this vulnerability in the security audit report For...

12. GHSA-528j-9r78-wffx etcd user credentials are stored in WAL logs in plaintext

    Published 2022-10-06

    Unknown

    Vulnerability type Data Exposure Workarounds The etcd assumes that the on disk files are secure. The possible fixes have been provided, however, it is the responsibility of the etcd users to make sure that the etcd server WAL log files are secure. The etcd doesn't encrypt key/val...

13. GHSA-h8g9-6gvh-5mrc etcd vulnerable to TOCTOU of gateway endpoint authentication

    Published 2022-10-06

    Unknown

    Vulnerability type Authentication Workarounds Refer to the gateway documentation. The vulnerability was spotted due to unclear documentation of how the gateway handles endpoints validation. Detail The gateway only authenticates endpoints detected from DNS SRV records, and it only...

14. CVE-2020-15136 Improper authentication in etcd

    Published 2020-08-06

    Medium·CVSS 6.5 EPSS 1.7%

    In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the di...

15. CVE-2020-15114 Denial of Service in etcd

    Published 2020-08-06

    High·CVSS 7.7 EPSS 1.1%

    In etcd before versions 3.3.23 and 3.4.10, the etcd gateway is a simple TCP proxy to allow for basic service discovery and access. However, it is possible to include the gateway address as an endpoint. This results in a denial of service, since the endpoint can become stuck in a...

16. CVE-2020-15115 No minimum password length in etcd

    Published 2020-08-06

    High·CVSS 7.5 EPSS 1.3%

    etcd before versions 3.3.23 and 3.4.10 does not perform any password length validation, which allows for very short passwords, such as those with a length of one. This may allow an attacker to guess or brute-force users' passwords with little computational effort.

17. CVE-2020-15112 Improper Input Validation in etcd

    Published 2020-08-05

    Medium·CVSS 6.5 EPSS 1.3%

    In etcd before versions 3.3.23 and 3.4.10, it is possible to have an entry index greater then the number of entries in the ReadAll method in wal/wal.go. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go do...

18. CVE-2020-15106 Improper Input Validation in etcd

    Published 2020-08-05

    Medium·CVSS 6.5 EPSS 1.3%

    In etcd before versions 3.3.23 and 3.4.10, a large slice causes panic in decodeRecord method. The size of a record is stored in the length field of a WAL file and no additional validation is done on this data. Therefore, it is possible to forge an extremely large frame size that...

19. CVE-2018-16886 go.etcd.io/etcd Authentication Bypass

    Published 2019-01-14

    High·CVSS 8.1 EPSS 4.1%

    etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 are vulnerable to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid R...

20. CVE-2018-1098 etcd Cross-site Request Forgery (CSRF)

    Published 2018-04-03

    High·CVSS 8.8 EPSS 1.2%

    A cross-site request forgery flaw was found in etcd 3.3.1 and earlier. An attacker can set up a website that tries to send a POST request to the etcd server and modify a key. Adding a key is done with PUT so it is theoretically safe (can't PUT from an HTML form or such) but POST...

21. CVE-2018-1099 DNS Rebinding in etcd

    Published 2018-04-03

    Medium·CVSS 5.5 EPSS 0.50%

    DNS rebinding vulnerability found in etcd 3.3.1 and earlier. An attacker can control his DNS records to direct to localhost, and trick the browser into sending requests to localhost (or any other address).

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.