CVE-2026-61672: projectcapsule capsule · Incorrect Comparison
Affects projectcapsule capsuleSource CVE Database V5
Not known to be exploited · CVSS 7.1 High : upgrade to 0.13.7 soon.
Data as of 2 Nov 2026, 22:58 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.13.7
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 18 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.
What to do
Upgrade capsule and projectcapsule/capsule to 0.13.7.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| projectcapsulecapsule | Affected
| Fixed in
|
GitHubprojectcapsule/capsulepkg:github/projectcapsule/capsuleOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade to projectcapsule Capsule version 0.13.7 or later, where this issue is fixed. No other mitigation is indicated or required.
Description
Capsule is a multi-tenancy and policy-based framework for Kubernetes. Prior to 0.13.7, ForbiddenListSpec.ExactMatch in pkg/api/forbidden_list.go sorts denied metadata keys case-insensitively and then uses sort.SearchStrings, which assumes byte-order sorting. When an administrator's forbidden list mixes capitalized and lowercase keys or otherwise has different case-insensitive and byte ordering, the binary search can return false for a key that is present. An authenticated tenant owner can then pass the missed key through api.ValidateForbidden and bypass configured namespace, Service, or delegated node metadata restrictions, potentially influencing cluster policies, network exposure, or scheduling outside the tenant boundary. Uniformly lowercase lists whose two orderings coincide are not affected. This issue is fixed in version 0.13.7.
References
- github.com/projectcapsule/capsule/security/advisories/GHSA-gjw4-3v3v-rqxg (opens in a new tab)
- github.com/projectcapsule/capsule/pull/1982 (opens in a new tab)
- github.com/projectcapsule/capsule/commit/755cef54bf4a1bc56d6692130132bc70755bef46 (opens in a new tab)
- github.com/projectcapsule/capsule/releases/tag/v0.13.7 (opens in a new tab)