GHSA-85gx-3qv6-4463Published

Dapr: Service Invocation path traversal ACL bypass

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cve-program · CVE-2026-41491

Published

Dapr is a portable, event-driven, runtime for building distributed applications across cloud and edge. From versions 1.3.0 to before 1.15.14, 1.16.0-rc.1 to before 1.16.14, and 1.17.0-rc.1 to before 1.17.5, a vulnerability has been found in Dapr that allows bypassing access control policies for service invocation using reserved URL characters and path traversal sequences in method paths. The ACL normalized the method path independently from the dispatch layer, so the ACL evaluated one path while the target application received a different one. This issue has been patched in versions 1.15.14, 1.16.14, and 1.17.5.

Source published: 8 May 2026 13:11:13 UTC
Source modified: 8 May 2026 13:58:57 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

euvd · EUVD-2026-28553

Published

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EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

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datePublished: May 8, 2026, 1:11:13 PM

dateUpdated: May 8, 2026, 1:58:57 PM

Source published: May 8, 2026, 1:11:13 PM (timezone not stated)
Source modified: May 8, 2026, 1:58:57 PM (timezone not stated)
Saved here: 13 Nov 2026 12:00:59 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

nvd · CVE-2026-41491

Published

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NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-22 · CWE-284 · NVD-CWE-noinfo

Original publisher date fields

published: 2026-05-08T14:16:33.407

lastModified: 2026-11-11T20:10:00.273

1 source CPE criteria · context only

cpe:2.3:a:linuxfoundation:dapr:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 8 May 2026 14:16:33 UTC
Source modified: 11 Nov 2026 20:10:00 UTC
Saved here: 12 Nov 2026 15:19:01 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

osv · GHSA-85gx-3qv6-4463

Published

### Summary A vulnerability has been found in Dapr that allows bypassing access control policies for service invocation using reserved URL characters and path traversal sequences in method paths. The ACL normalized the method path independently from the dispatch layer, so the ACL evaluated one path while the target application received a different one. Users who have configured access control policies for service invocation are strongly encouraged to upgrade Dapr to the respective patch version `1.17.5`, `1.16.14`, and `1.15.14`. ### Impact This vulnerability impacts Dapr users who have configured access control policies for service invocation. An attacker who can reach the Dapr HTTP or gRPC API could: - Use encoded path traversal (ex: `admin%2F..%2Fpublic`) to reach an allowed path while the method started from a denied prefix. - Use encoded fragment (`%23`) or query (`%3F`) characters to cause the ACL to evaluate a different path than what was delivered to the target application. ### Patches Users should upgrade immediately to their respective Dapr version `1.17.5`, `1.16.14`, and `1.15.14`. ### Details Dapr supports access control policies for service invocation, which allow operators to restrict which methods an application is permitted to call on a target app. When a request arrives, Dapr evaluates the method path against the configured policy before dispatching to the target. Prior to this fix, the ACL and the dispatch layer normalized the method path independently. The ACL used `purell.NormalizeURLString`, which decoded `%XX` sequences, resolved `../`, and stripped `#` and `?` as URL delimiters. The dispatch layer used the raw method string. This mismatch meant the ACL authorized one path while the target application received a different one. For example, a method of `admin%2F..%2Fpublic` was normalized by the ACL to public (allowed), but the target application received `admin/../public`. The gRPC API was the more dangerous vector because gRPC passes method strings raw — `#`, `?`, `../`, and control characters were all delivered literally with no client-side sanitization. ### References [This PR](https://github.com/dapr/dapr/pull/9589) signaled to us about the CVE, special thanks to @dbconfession78 for the efforts here and the original PR.

Source published: 17 Apr 2026 22:20:40 UTC
Source modified: 10 Sep 2026 03:51:01 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Publisher rating · HIGH

osv · GO-2026-5242

Published

Dapr: Service Invocation path traversal ACL bypass in github.com/dapr/dapr

Source published: 25 Jun 2026 18:43:15 UTC
Source modified: 25 Jun 2026 19:45:21 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.