CVE-2025-32793: Github.com/cilium/cilium Security Vulnerability Vulnerability
MODERATECVE-2025-32793 is a MODERATE (CVSS 4.0) security vulnerability vulnerability (CWE-319: Cleartext Transmission of Sensitive Information) affecting Github.com/cilium/cilium libraries in the Go ecosystem. The issue involves in cilium, packets from terminating endpoints may not be encrypted in wireguard-enabled clusters. Remediation is available by upgrading affected packages to version 1.15.16, 1.16.9, 1.17.3.
CVE-2025-32793 at a Glance
Security Impact
CVSS: 4.0
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N).
How to Fix CVE-2025-32793
To remediate this vulnerability, upgrade all affected Github.com/cilium/cilium dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/cilium/cilium to 1.15.16Upgrade github.com/cilium/cilium to 1.16.9Upgrade github.com/cilium/cilium to 1.17.3Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/cilium/ciliumHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-32793, inspect your project dependencies for Github.com/cilium/cilium:
inspect dependencies for github.com/cilium/ciliumAnalyze the terminal output to locate any version of Github.com/cilium/cilium in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.15.16), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-319: Cleartext Transmission of Sensitive Information, where the product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. In Github.com/cilium/cilium, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-32793 Affected Github.com/cilium/cilium Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/cilium/cilium
|
Go |
≥ 1.13.0
< 1.15.16
|
1.15.16
|
|
github.com/cilium/cilium
|
Go |
≥ 1.16.0
< 1.16.9
|
1.16.9
|
|
github.com/cilium/cilium
|
Go |
≥ 1.17.0
< 1.17.3
|
1.17.3
|
References
Frequently Asked Questions
What is CVE-2025-32793?
Which Github.com/cilium/cilium versions are affected?
What version fixes CVE-2025-32793?
Is github.com/cilium/cilium affected?
What is the CVSS score of CVE-2025-32793?
What CWE is associated with CVE-2025-32793?
How can I check Go dependencies for CVE-2025-32793?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-5vxx-c285-pcq4",
"modified" : "2025-04-23T14:41:18Z",
"published" : "2025-04-21T16:17:49Z",
"aliases" : [ "CVE-2025-32793" ],
"summary" : "In Cilium, packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters",
"details" : "### Impact\n\nWhen using [Wireguard transparent encryption](https://docs.cilium.io/en/stable/security/network/encryption-wireguard/#encryption-wg) in a Cilium cluster, packets that originate from a terminating endpoint can leave the source node without encryption due to a race condition in how traffic is processed by Cilium.\n\n### Patches\n\nThis issue has been patched in https://github.com/cilium/cilium/pull/38592.\n\nThis issue affects:\n\n- Cilium v1.15 between v1.15.0 and v1.15.15 inclusive\n- Cilium v1.16 between v1.16.0 and v1.16.8 inclusive\n- Cilium v1.17 between v1.17.0 and v1.17.2 inclusive\n\nThis issue is fixed in:\n\n- Cilium v1.15.16\n- Cilium v1.16.9\n- Cilium v1.17.3\n\n### Workarounds\n\nThere is no workaround to this issue.\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @gandro and @pippolo84 for reporting this issue and to @julianwiedmann for the patch.\n\n### For more information\n\nIf you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and your report will be treated as top priority.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/cilium/cilium"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.13.0"
}, {
"fixed" : "1.15.16"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/cilium/cilium"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.16.0"
}, {
"fixed" : "1.16.9"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/cilium/cilium"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.17.0"
}, {
"fixed" : "1.17.3"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/cilium/cilium/security/advisories/GHSA-5vxx-c285-pcq4"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-32793"
}, {
"type" : "WEB",
"url" : "https://github.com/cilium/cilium/pull/38592"
}, {
"type" : "WEB",
"url" : "https://github.com/cilium/cilium/commit/e8543eef05126e9ba8a845dc74e96f4e30f6dba9"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/cilium/cilium"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-319", "CWE-362" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-04-21T16:17:49Z",
"nvd_published_at" : "2025-04-21T16:15:54Z"
}
}