Exploitation evidence
Not listed in the latest downloaded CISA KEV catalog. This does not establish an absence of exploitation.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
The HDF Group / HDF5
Default status: unaffected
- affected: <2.3.0 (custom)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
Monitored source mentions
Shared CVE identifiers link source mentions; they do not establish that the reports describe the same incident.
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.00176,
"percentile": 0.07213
}11 Nov 2026, 12:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.00176,
"percentile": 0.07192
}11 Nov 2026, 12:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
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"metrics": [
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"other": {
"content": {
"id": "CVE-2026-120689",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2026-11-02T19:52:19.579381Z",
"version": "2.0.3"
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"type": "ssvc"
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-674",
"description": "CWE-674 Uncontrolled Recursion",
"lang": "en",
"type": "CWE"
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"modules": [
"H5Gget_info"
],
"product": "HDF5",
"vendor": "The HDF Group",
"versions": [
{
"status": "affected",
"version": "<2.3.0",
"versionType": "custom"
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"lang": "en",
"type": "reporter",
"value": "Gabe Sherman"
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"type": "text/html",
"value": "HDF5 through 2.2.0 contains an uncontrolled recursion vulnerability in <code>H5B__iterate_helper()</code> in <code>src/H5B.c</code>. When iterating a version 1 B-tree, the function does not verify that a child node’s level matches the expected level. That check is performed only in <code>H5B__cache_deserialize()</code> when a node is first loaded into the metadata cache. A crafted HDF5 file whose B-tree child pointer refers back to a node already in the cache, such as a node that points to itself, bypasses the check and causes unbounded recursion, leading to stack exhaustion and a crash. This can be triggered by calling <code>H5Gget_info()</code> or <code>H5Gget_num_objs()</code> on a group in the crafted file, which reaches <code>H5B_iterate()</code> through <code>H5G__obj_info()</code> and <code>H5G__stab_count()</code>. An attacker who can get a user or application to open a malicious file can cause a denial of service. "
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}
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"metrics": [
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"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"exploitMaturity": "UNREPORTED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
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"format": "CVSS",
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"dateUpdated": "2026-11-02T19:39:28.327Z",
"orgId": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
"shortName": "HDFG"
},
"references": [
{
"url": "https://github.com/HDFGroup/hdf5/issues/6403"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Uncontrolled Recursion in HDF5 H5B__iterate_helper() via Crafted File",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "HDFG",
"cveId": "CVE-2026-120689",
"datePublished": "2026-11-02T19:39:28.327Z",
"dateReserved": "2026-11-02T19:32:16.362Z",
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