CVE-2021-22922

What it is

When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data tampering.

Exploit odds

4.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-08-05 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-14 11:16 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 4.3% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-08-05 21:15 UTC

Last modified

2026-10-14 11:16 UTC

Exploit probability

4.3% · EPSS, next 30 days

Weakness

CWE-840

Record status

Modified

Affected

• Haxx Curl < 7.78.0
• Fedoraproject Fedora 33
• Netapp Cloud Backup
• Netapp Clustered Data Ontap
• Netapp Hci Management Node
• Netapp Solidfire
• Oracle MySQL Server ≤ 5.7.35
• Oracle MySQL Server ≤ 8.0.26

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-22922.md and follow it. Check whether this project is affected by CVE-2021-22922. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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