GHSA-v74w-7mr3-4qg3

Source

https://github.com/advisories/GHSA-v74w-7mr3-4qg3

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-v74w-7mr3-4qg3/GHSA-v74w-7mr3-4qg3.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-v74w-7mr3-4qg3

Aliases

CVE-2026-73507

Downstream

CGA (44)

CLSA (12)

MINI (10)

Published

2026-07-24T16:53:04Z

Modified

2026-08-13T14:41:17Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

Netty: Denial of Service in XmlFrameDecoder via CPU Exhaustion

Details

Summary

An attacker can cause Denial of Service by sending a specially crafted malicious XML payload (e.g., repeated </ characters) to a Netty server utilizing XmlFrameDecoder, causing the server's EventLoop thread to exhaust CPU resources and become unresponsive.

Details

io.netty.handler.codec.xml.XmlFrameDecoder suffers from a vulnerability resulting in CPU exhaustion. When < followed by / is encountered, the decoder scans the remaining buffer for a closing >. Because the parser state is not saved between decode() invocations, an attacker can trickle-feed a payload of </ characters. This forces the decoder to repeatedly rescan the entire accumulated buffer. A 1MB maxFrameLength is enough to completely hang a server's thread while it loops endlessly.

Impact

Denial of Service via CPU Exhaustion. Any application utilizing Netty's XmlFrameDecoder is impacted. An unauthenticated remote attacker can exploit this flaw by sending a modest amount of malformed XML data to an exposed port.

Database specific

{
    "cwe_ids":  [
        "CWE-400"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-24T16:53:04Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}

References

Affected packages

Maven / io.netty:netty-codec-xml

Package

Name: io.netty:netty-codec-xml; View open source insights on deps.dev
Purl: pkg:maven/io.netty/netty-codec-xml

Affected ranges

Type: ECOSYSTEM
Events: Introduced

4.2.0.Final

Fixed

4.2.16.Final

Affected versions

4.*

4.2.0.Final

4.2.1.Final

4.2.2.Final

4.2.3.Final

4.2.4.Final

4.2.5.Final

4.2.6.Final

4.2.7.Final

4.2.8.Final

4.2.9.Final

4.2.10.Final

4.2.11.Final

4.2.12.Final

4.2.13.Final

4.2.14.Final

4.2.15.Final

Database specific

last_known_affected_version_range

"<= 4.2.15.Final"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-v74w-7mr3-4qg3/GHSA-v74w-7mr3-4qg3.json"

Maven / io.netty:netty-codec-xml

Package

Name: io.netty:netty-codec-xml; View open source insights on deps.dev
Purl: pkg:maven/io.netty/netty-codec-xml

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

4.1.136.Final

Affected versions

4.*

4.1.0.Beta4

4.1.0.Beta5

4.1.0.Beta6

4.1.0.Beta7

4.1.0.Beta8

4.1.0.CR1

4.1.0.CR2

4.1.0.CR3

4.1.0.CR4

4.1.0.CR5

4.1.0.CR6

4.1.0.CR7

4.1.0.Final

4.1.1.Final

4.1.2.Final

4.1.3.Final

4.1.4.Final

4.1.5.Final

4.1.6.Final

4.1.7.Final

4.1.8.Final

4.1.9.Final

4.1.10.Final

4.1.11.Final

4.1.12.Final

4.1.13.Final

4.1.14.Final

4.1.15.Final

4.1.16.Final

4.1.17.Final

4.1.18.Final

4.1.19.Final

4.1.20.Final

4.1.21.Final

4.1.22.Final

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4.1.128.Final

4.1.129.Final

4.1.130.Final

4.1.131.Final

4.1.132.Final

4.1.133.Final

4.1.134.Final

4.1.135.Final

Database specific

last_known_affected_version_range

"<= 4.1.135.Final"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-v74w-7mr3-4qg3/GHSA-v74w-7mr3-4qg3.json"