CVE-2025-59348: Github.com/dragonflyoss/dragonfly Dragonfly Incorrectly Handles A Task Vulnerability
MODERATECVE-2025-59348 is a MODERATE dragonfly incorrectly handles a task vulnerability (CWE-457: Use of Uninitialized Variable) affecting Github.com/dragonflyoss/dragonfly libraries in the Go ecosystem. The issue involves dragonfly incorrectly handles a task structure’s usedtrac field. Remediation is available by upgrading affected packages to version 2.1.0.
CVE-2025-59348 at a Glance
How to Fix CVE-2025-59348
To remediate this vulnerability, upgrade all affected Github.com/dragonflyoss/dragonfly 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/dragonflyoss/dragonfly to 2.1.0Upgrade d7y.io/dragonfly/v2 to 2.1.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/dragonflyoss/dragonflyHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-59348, inspect your project dependencies for Github.com/dragonflyoss/dragonfly:
inspect dependencies for github.com/dragonflyoss/dragonflyAnalyze the terminal output to locate any version of Github.com/dragonflyoss/dragonfly in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.1.0), 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-457: Use of Uninitialized Variable, where the code uses a variable that has not been initialized, leading to unpredictable or unintended results. In Github.com/dragonflyoss/dragonfly, 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-2025-59348 Affected Github.com/dragonflyoss/dragonfly Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/dragonflyoss/dragonfly
|
Go |
< 2.1.0
|
2.1.0
|
|
d7y.io/dragonfly/v2
|
Go |
< 2.1.0
|
2.1.0
|
References
Frequently Asked Questions
What is CVE-2025-59348?
Which Github.com/dragonflyoss/dragonfly versions are affected?
What version fixes CVE-2025-59348?
Is github.com/dragonflyoss/dragonfly affected?
Is d7y.io/dragonfly/v2 affected?
What CWE is associated with CVE-2025-59348?
How can I check Go dependencies for CVE-2025-59348?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-2qgr-gfvj-qpcr",
"modified" : "2025-09-26T16:17:10Z",
"published" : "2025-09-17T19:48:41Z",
"aliases" : [ "CVE-2025-59348" ],
"summary" : "Dragonfly incorrectly handles a task structure’s usedTrac field",
"details" : "### Impact\nThe processPieceFromSource method (figure 4.1) is part of a task processing mechanism. The method writes pieces of data to storage, updating a Task structure along the way. The method does not update the structure’s usedTraffic field, because an uninitialized variable n is used as a guard to the AddTraffic method call, instead of the result.Size variable.\n\n```golang\nvar n int64\nresult.Size, err = pt.GetStorage().WritePiece([skipped])\nresult.FinishTime = time.Now().UnixNano()\nif n > 0 {\n pt.AddTraffic(uint64(n))\n}\n```\n\nA task is processed by a peer. The usedTraffic metadata is not updated during the processing. Rate limiting is incorrectly applied, leading to a denial-of-service condition for the peer.\n\n### Patches\n\n- Dragonfy v2.1.0 and above.\n\n### Workarounds\n\nThere are no effective workarounds, beyond upgrading.\n\n### References\n\nA third party security audit was performed by Trail of Bits, you can see the [full report](https://github.com/dragonflyoss/dragonfly/blob/main/docs/security/dragonfly-comprehensive-report-2023.pdf).\n\nIf you have any questions or comments about this advisory, please email us at [dragonfly-maintainers@googlegroups.com](mailto:dragonfly-maintainers@googlegroups.com).",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/dragonflyoss/dragonfly"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.1.0"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "d7y.io/dragonfly/v2"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.1.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/dragonflyoss/dragonfly/security/advisories/GHSA-2qgr-gfvj-qpcr"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-59348"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/dragonflyoss/dragonfly"
}, {
"type" : "WEB",
"url" : "https://github.com/dragonflyoss/dragonfly/blob/main/docs/security/dragonfly-comprehensive-report-2023.pdf"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2025-3963"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-457" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-09-17T19:48:41Z",
"nvd_published_at" : "2025-09-17T20:15:37Z"
}
}