High
Security advisory
When reading a specially crafted 7Z archive, Compress can be made to allocate large amounts of memory that finally leads to an out of memory error even for very small inputs. This could be used to mount a denial of service attack against services that use Compress' sevenz package.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-35516
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:51 UTC · Revision 1
Source evidence
When reading a specially crafted 7Z archive, Compress can be made to allocate large amounts of memory that finally leads to an out of memory error even for very small inputs. This could be used to mount a denial of service attack against services that use Compress' sevenz package.
osv:CVE-2021-35516
Complete source record
{
"id": "6369cfb285f8f0238b11a7cf00434ae91f44f5fd0c2975af4811dd09f03e1bd9",
"url": "https://osv.dev/vulnerability/CVE-2021-35516",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-35516",
"summary": "When reading a specially crafted 7Z archive, Compress can be made to allocate large amounts of memory that finally leads to an out of memory error even for very small inputs. This could be used to mount a denial of service attack against services that use Compress' sevenz package.",
"evidence": "osv:CVE-2021-35516",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-35516",
"aliases": [
"CVE-2021-35516",
"GHSA-crv7-7245-f45f"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
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"type": "GIT",
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}
}
],
"modified": "2026-10-24T10:30:33.445658294Z",
"provider": "osv",
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"https://lists.apache.org/thread.html/r67ef3c07fe3b8c1b02d48012149d280ad6da8e4cec253b527520fb2b%40%3Cdev.poi.apache.org%3E",
"https://lists.apache.org/thread.html/r9f54c0caa462267e0cc68b49f141e91432b36b23348d18c65bd0d040%40%3Cnotifications.skywalking.apache.org%3E",
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"https://lists.apache.org/thread.html/rb064d705fdfa44b5dae4c366b369ef6597951083196321773b983e71%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/rb6e1fa80d34e5ada45f72655d84bfd90db0ca44ef19236a49198c88c%40%3Cnotifications.skywalking.apache.org%3E",
"https://lists.apache.org/thread.html/rb7adf3e55359819e77230b4586521e5c6874ce5ed93384bdc14d6aee%40%3Cnotifications.skywalking.apache.org%3E",
"https://lists.apache.org/thread.html/rba65ed5ddb0586f5b12598f55ec7db3633e7b7fede60466367fbf86a%40%3Cnotifications.skywalking.apache.org%3E",
"https://lists.apache.org/thread.html/rd4332baaf6debd03d60deb7ec93bee49e5fdbe958cb6800dff7fb00e%40%3Cnotifications.skywalking.apache.org%3E",
"https://lists.apache.org/thread.html/rf5b1016fb15b7118b9a5e16bb0b78cb4f1dfcf7821eb137ab5757c91%40%3Cannounce.apache.org%3E",
"https://lists.apache.org/thread.html/rfba19167efc785ad3561e7ef29f340d65ac8f0d897aed00e0731e742%40%3Cnotifications.skywalking.apache.org%3E",
"https://commons.apache.org/proper/commons-compress/security-reports.html",
"https://lists.apache.org/thread.html/rf68442d67eb166f4b6cf0bbbe6c7f99098c12954f37332073c9822ca%40%3Cuser.commons.apache.org%3E",
"https://security.netapp.com/advisory/ntap-20211022-0001/",
"https://www.oracle.com/security-alerts/cpuapr2022.html",
"https://www.oracle.com/security-alerts/cpujan2022.html",
"https://www.oracle.com/security-alerts/cpujul2022.html",
"https://www.oracle.com/security-alerts/cpuoct2021.html"
],
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{
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},
{
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{
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],
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}
]
},
{
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},
{
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]
},
{
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],
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{
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{
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],
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]
},
{
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{
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{
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{
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{
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]
},
{
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],
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]
},
{
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],
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]
},
{
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],
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}
],
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}
]
},
{
"cpes": [
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],
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{
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}
],
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]
},
{
"cpes": [
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{
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{
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{
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{
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],
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]
},
{
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{
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],
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]
},
{
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{
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}
],
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]
},
{
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"cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.3.1:*:*:*:*:*:*:*"
],
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{
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{
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}
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}
]
},
{
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],
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{
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{
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{
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{
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}
],
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}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-35516",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 433283,
"published_at": "2021-07-13T08:15:07.137+00:00"
}