CVE-2022-22728

CVE-2022-22728 is a high-severity vulnerability in Apache Libapreq2 with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-120
• Affected product: Apache Libapreq2
• Published: 2022-08-25
• Last modified: 2026-06-17

Description

A flaw in Apache libapreq2 versions 2.16 and earlier could cause a buffer overflow while processing multipart form uploads. A remote attacker could send a request causing a process crash which could lead to a denial of service attack.

Frequently asked questions

What is CVE-2022-22728?

A flaw in Apache libapreq2 versions 2.16 and earlier could cause a buffer overflow while processing multipart form uploads. A remote attacker could send a request causing a process crash which could lead to a denial of service attack.

How severe is CVE-2022-22728?

CVE-2022-22728 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-22728 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-22728?

CVE-2022-22728 primarily affects Apache Libapreq2. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-22728?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-22728 published?

CVE-2022-22728 was published on 2022-08-25 and last updated on 2026-06-17.

References

• http://www.openwall.com/lists/oss-security/2022/08/25/3
• http://www.openwall.com/lists/oss-security/2022/08/25/4
• http://www.openwall.com/lists/oss-security/2022/08/26/4
• http://www.openwall.com/lists/oss-security/2022/12/29/1
• http://www.openwall.com/lists/oss-security/2022/12/30/4
• http://www.openwall.com/lists/oss-security/2022/12/31/1
• http://www.openwall.com/lists/oss-security/2022/12/31/5
• http://www.openwall.com/lists/oss-security/2023/01/02/1
• http://www.openwall.com/lists/oss-security/2023/01/02/2
• http://www.openwall.com/lists/oss-security/2023/01/03/2
• https://lists.apache.org/thread/2fsjoor96d47vtkpf76x4yo06nccvy1y
• https://lists.debian.org/debian-lts-announce/2023/01/msg00009.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2PUUS3JL44UUSLJTSXE46HVKZIW7E7PE/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HZZKVHYYWACPWONPEFRNPIRE3HYLV4T/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE5MEHGIQUEIISBCVHM43IN2NBDXBFOJ/
• https://security.gentoo.org/glsa/202305-20

Affected products (5)

• cpe:2.3:a:apache:libapreq2:*:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

More vulnerabilities in Apache Libapreq2

• CVE-2019-12412 — High (CVSS 7.5): A flaw in the libapreq2 v2.07 to v2.13 multipart parser can deference a null pointer leading to a process crash. A…
• CVE-2006-0042 — Medium (CVSS 5.0): Unspecified vulnerability in (1) apreq_parse_headers and (2) apreq_parse_urlencoded functions in Apache2::Request…

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