CVE-2021-35516— Apache Commons Compress 1.6 to 1.20 denial of service vulnerability

EPSS 1.74% · P83 Updated Feb 25, 2026

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I. Basic Information for CVE-2021-35516

Vulnerability Information

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Vulnerability Title

Apache Commons Compress 1.6 to 1.20 denial of service vulnerability

Source: NVD (National Vulnerability Database)

Vulnerability Description

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.

Source: NVD (National Vulnerability Database)

CVSS Information

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Type

长度参数不一致性处理不恰当

Source: NVD (National Vulnerability Database)

Vulnerability Title

Apache Commons Compress 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Apache Commons Compress是美国阿帕奇（Apache）基金会的一个用于处理压缩文件的库。 Apache Commons Compress存在安全漏洞，该漏洞源于当读取一个特殊制作的7Z归档文件时，Compress可以分配大量内存，从而导致非常小的输入出现内存不足错误。

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Apache Software Foundation	Apache Commons Compress	1.6 ~ Apache Commons Compress*	-

II. Public POCs for CVE-2021-35516

#	POC Description	Source Link	Shenlong Link
1	None	https://github.com/andikahilmy/CVE-2021-35516-commons-compress-vulnerable	POC Details

AI-Generated POCPremium

No public POC found.

III. Intelligence Information for CVE-2021-35516

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https://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
https://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC
https://commons.apache.org/proper/commons-compress/security-reports.htmlx_refsource_MISC
https://www.oracle.com/security-alerts/cpujul2022.htmlx_refsource_MISC
https://security.netapp.com/advisory/ntap-20211022-0001/x_refsource_CONFIRM
https://lists.apache.org/thread.html/rf68442d67eb166f4b6cf0bbbe6c7f99098c12954f37332073c9822ca%40%3Cuser.commons.apache.org%3Ex_refsource_MISC
https://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
https://lists.apache.org/thread.html/r67ef3c07fe3b8c1b02d48012149d280ad6da8e4cec253b527520fb2b%40%3Cdev.poi.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rf5b1016fb15b7118b9a5e16bb0b78cb4f1dfcf7821eb137ab5757c91%40%3Cannounce.apache.org%3Emailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/07/13/2mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rb7adf3e55359819e77230b4586521e5c6874ce5ed93384bdc14d6aee%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rb064d705fdfa44b5dae4c366b369ef6597951083196321773b983e71%40%3Ccommits.pulsar.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rfba19167efc785ad3561e7ef29f340d65ac8f0d897aed00e0731e742%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rba65ed5ddb0586f5b12598f55ec7db3633e7b7fede60466367fbf86a%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rd4332baaf6debd03d60deb7ec93bee49e5fdbe958cb6800dff7fb00e%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/racd0c0381c8404f298b226cd9db2eaae965b14c9c568224aa3f437ae%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9f54c0caa462267e0cc68b49f141e91432b36b23348d18c65bd0d040%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rb6e1fa80d34e5ada45f72655d84bfd90db0ca44ef19236a49198c88c%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST
https://nvd.nist.gov/vuln/detail/CVE-2021-35516

Same Patch Batch · Apache Software Foundation · 2021-07-13 · 4 CVEs total

CVE-2021-35515		Apache Commons Compress 1.6 to 1.20 denial of service vulnerability
CVE-2021-35517		Apache Commons Compress 1.1 to 1.20 denial of service vulnerability
CVE-2021-36090		Apache Commons Compress 1.0 to 1.20 denial of service vulnerability

IV. Related Vulnerabilities

Same product: Apache Commons Compress

Same vendor: Apache Software Foundation

Same weakness: CWE-130

V. Comments for CVE-2021-35516

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CVE-2021-35516— Apache Commons Compress 1.6 to 1.20 denial of service vulnerability

I. Basic Information for CVE-2021-35516

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2021-35516

III. Intelligence Information for CVE-2021-35516

Same Patch Batch · Apache Software Foundation · 2021-07-13 · 4 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2021-35516

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