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| Vulnerability ID | VCID-du5r-hn2a-rfe1 |
| Aliases |
CVE-2026-41081
GHSA-j2q8-xx3q-8fqh |
| Summary | Improper Handling of TLS Client Authentication Failure Leading to Anonymous Principal Assignment in Apache Storm Versions Affected: up to 2.8.7 Description: When TLS transport is enabled in Apache Storm without requiring client certificate authentication (the default configuration), the TlsTransportPlugin assigns a fallback principal (CN=ANONYMOUS) if no client certificate is presented or if certificate verification fails. The underlying SSLPeerUnverifiedException is caught and suppressed rather than rejecting the connection. This fail-open behavior means an unauthenticated client can establish a TLS connection and receive a valid principal identity. If the configured authorizer (e.g., SimpleACLAuthorizer) does not explicitly deny access to CN=ANONYMOUS, this may result in unauthorized access to Storm services. The condition is logged at debug level only, reducing visibility in production. Impact: Unauthenticated clients may be assigned a principal identity, potentially bypassing authorization in permissive or misconfigured environments. Mitigation: Users should upgrade to 2.8.7 in which TLS authentication failures are handled in a fail-closed manner. Users who cannot upgrade immediately should: - Enable mandatory client certificate authentication (nimbus.thrift.tls.client.auth.required: true) - Ensure authorization rules explicitly deny access to CN=ANONYMOUS - Review all ACL configurations for implicit default-allow behavior |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 6.2 |
| Risk | 3.1 |
| Affected and Fixed Packages | Package Details |
| System | Score | Found at |
|---|---|---|
| epss | 0.0014 | https://api.first.org/data/v1/epss?cve=CVE-2026-41081 |
| epss | 0.0014 | https://api.first.org/data/v1/epss?cve=CVE-2026-41081 |
| cvssv3.1_qr | MODERATE | https://github.com/advisories/GHSA-j2q8-xx3q-8fqh |
| cvssv3.1 | 6.5 | https://github.com/apache/storm |
| generic_textual | MODERATE | https://github.com/apache/storm |
| cvssv3.1 | 6.5 | https://lists.apache.org/thread/plxx5l29dvplk5rwzdcq53rdfl6v4gs8 |
| generic_textual | MODERATE | https://lists.apache.org/thread/plxx5l29dvplk5rwzdcq53rdfl6v4gs8 |
| ssvc | Track | https://lists.apache.org/thread/plxx5l29dvplk5rwzdcq53rdfl6v4gs8 |
| cvssv3.1 | 6.5 | https://nvd.nist.gov/vuln/detail/CVE-2026-41081 |
| generic_textual | MODERATE | https://nvd.nist.gov/vuln/detail/CVE-2026-41081 |
| cvssv3.1 | 6.5 | http://www.openwall.com/lists/oss-security/2026/04/25/3 |
| generic_textual | MODERATE | http://www.openwall.com/lists/oss-security/2026/04/25/3 |
| Reference id | Reference type | URL |
|---|---|---|
| https://api.first.org/data/v1/epss?cve=CVE-2026-41081 | ||
| https://github.com/apache/storm | ||
| https://nvd.nist.gov/vuln/detail/CVE-2026-41081 | ||
| http://www.openwall.com/lists/oss-security/2026/04/25/3 | ||
| GHSA-j2q8-xx3q-8fqh | https://github.com/advisories/GHSA-j2q8-xx3q-8fqh | |
| plxx5l29dvplk5rwzdcq53rdfl6v4gs8 | https://lists.apache.org/thread/plxx5l29dvplk5rwzdcq53rdfl6v4gs8 |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Percentile | 0.33932 |
| EPSS Score | 0.0014 |
| Published At | June 11, 2026, 12:55 p.m. |
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| 2026-06-11T16:51:16.202669+00:00 | Vulnrichment | Import | https://github.com/cisagov/vulnrichment/blob/develop/2026/41xxx/CVE-2026-41081.json | 38.6.0 |