CVE-2026-59818
No exploitation reported by the sources we read.
- Published2026-07-08
- Fixed in3.6.13 · 3.5.32
- WeaknessCWE-295
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
etcd is a distributed key-value store for the data of a distributed system. Prior to 3.5.32 and 3.6.13, when etcd is configured with --listen-client-http-urls to split HTTP and gRPC client endpoints onto separate listeners, the --client-crl-file Certificate Revocation List is not enforced on the gRPC listener, allowing a client with a revoked certificate to authenticate successfully over gRPC. This issue is fixed in versions 3.5.32 and 3.6.13.
Timeline
dates in UTC- 2026-07-0821:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-59818?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-59818?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.6 | ≥ 3.6.0, < 3.6.13 | 3.6.13 | NVD · OSV |
| 3.5 | < 3.5.32 | 3.5.32 | NVD · OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener
etcd as a component of Red Hat OpenStack Platform 16.2 · etcd.src as a component of Red Hat OpenStack Platform 16.2 · etcd as a component of Red Hat OpenStack Platform 17.1 · +1 more
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Fix
- Update Etcd to 3.6.13 · 3.5.32
- Vendor fix Red Hat Product Security RHSA-2026:44868 · 3 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
- No fix available, says the vendor Red Hat Product Security CVE-2026-59818 · 4 productsFix deferred
Advisories and patches
- github.comPatch
- github.comPatch
- github.comPatch
- github.comPatch
- github.comPatch
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Published
- 2026-07-08
- Last Modified
- 2026-07-13
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2026-59818?
Is CVE-2026-59818 actively exploited?
What is the CVSS score for CVE-2026-59818?
Running etcd? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.