CVE-2026-110673 (GCVE-0-2026-110673)
Vulnerability from cvelistv5 – Published: 2026-10-19 18:11 – Updated: 2026-10-19 18:11
VLAI
EPSS
VEX
Title
Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag
Summary
Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag.
With allow_tags, "(" starts a tagged value. Its tag and value are decoded recursively, and each can start another tagged value. Unlike arrays and objects, this nesting is not counted against max_depth.
A run of "(" bytes exhausts the C stack and triggers an uncatchable segmentation fault regardless of max_depth.
Severity
No CVSS data available.
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/rurban/Cpanel-JSON-XS/commit/9… | patch |
| https://metacpan.org/release/RURBAN/Cpanel-JSON-X… | release-notes |
{
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://cpan.org/modules",
"defaultStatus": "unaffected",
"modules": [
"Cpanel::JSON::XS"
],
"packageName": "Cpanel-JSON-XS",
"packageURL": "pkg:cpan/Cpanel-JSON-XS",
"programFiles": [
"XS.xs"
],
"programRoutines": [
{
"name": "decode_tag"
}
],
"repo": "https://github.com/rurban/Cpanel-JSON-XS",
"versions": [
{
"lessThan": "4.80",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag.\n\nWith allow_tags, \"(\" starts a tagged value. Its tag and value are decoded recursively, and each can start another tagged value. Unlike arrays and objects, this nesting is not counted against max_depth.\n\nA run of \"(\" bytes exhausts the C stack and triggers an uncatchable segmentation fault regardless of max_depth."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-674",
"description": "CWE-674 Uncontrolled Recursion",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-19T18:11:15.412Z",
"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"shortName": "CPANSec"
},
"references": [
{
"tags": [
"patch"
],
"url": "https://github.com/rurban/Cpanel-JSON-XS/commit/995eb484a9351753e2a8ec3317918b5b4a4e086a.patch"
},
{
"tags": [
"release-notes"
],
"url": "https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to Cpanel-JSON-XS 4.80 or later."
}
],
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2026-10-14T00:00:00.000Z",
"value": "Version 4.80 released with fix."
}
],
"title": "Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag",
"x_generator": {
"engine": "cpansec-cna-tool 0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"assignerShortName": "CPANSec",
"cveId": "CVE-2026-110673",
"datePublished": "2026-10-19T18:11:15.412Z",
"dateReserved": "2026-10-14T13:22:59.046Z",
"dateUpdated": "2026-10-19T18:11:15.412Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-110673",
"date": "2026-10-20",
"epss": "0.00171",
"percentile": "0.06118"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"collectionURL": "https://cpan.org/modules",
"defaultStatus": "unaffected",
"modules": [
"Cpanel::JSON::XS"
],
"packageName": "Cpanel-JSON-XS",
"packageURL": "pkg:cpan/Cpanel-JSON-XS",
"programFiles": [
"XS.xs"
],
"programRoutines": [
{
"name": "decode_tag"
}
],
"repo": "https://github.com/rurban/Cpanel-JSON-XS",
"versions": [
{
"lessThan": "4.80",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag.\n\nWith allow_tags, \"(\" starts a tagged value. Its tag and value are decoded recursively, and each can start another tagged value. Unlike arrays and objects, this nesting is not counted against max_depth.\n\nA run of \"(\" bytes exhausts the C stack and triggers an uncatchable segmentation fault regardless of max_depth."
}
],
"id": "CVE-2026-110673",
"lastModified": "2026-10-19T20:50:17.967",
"metrics": {},
"published": "2026-10-19T19:17:20.877",
"references": [
{
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"url": "https://github.com/rurban/Cpanel-JSON-XS/commit/995eb484a9351753e2a8ec3317918b5b4a4e086a.patch"
},
{
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"url": "https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"
}
],
"sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-674"
}
],
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-10-20T20:59:03+00:00",
"cve": "CVE-2026-110673",
"id": "CVE-2026-110673",
"initial_release_date": "2026-10-19T18:11:15.412000+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "perl-Cpanel-JSON-XS: Stack exhaustion via nested tagged values under allow_tags",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110673.json",
"version": "3"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.