CVE-2022-21230: This affects all versions of package org.nanohttpd:nanohttpd

Q: How do I fix CVE-2022-21230?

nanohttpd: upgrade to newer than 2.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2022-21230 being exploited?

CVE-2022-21230 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-21230 affect?

CVE-2022-21230 affects nanohttpd. Severity is medium (CVSS 5.5). This affects all versions of package org.nanohttpd:nanohttpd. Whenever an HTTP Session is parsing the body of an HTTP request, the body of the request is written to a RandomAccessFile when the it is larger than 1024 bytes. This file is crea

Q: How urgent is CVE-2022-21230?

Priority 25/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2022-21230 is a medium-severity flaw (CVSS 5.5) affecting nanohttpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects all versions of package org.nanohttpd:nanohttpd. Whenever an HTTP Session is parsing the body of an HTTP request, the body of the request is written to a RandomAccessFile when the it is larger than 1024 bytes. This file is created with insecure permissions that allow its contents to be viewed by all users on the host machine. **Workaround:** Manually specifying the -Djava.io.tmpdir= argument when launching Java to set the temporary d

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Published	2022-05-01
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: nanohttpd

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-05-01 16:15 UTCPublished CVE record published
2026-06-17 04:25 UTCUpdated Record last modified

nanohttpd nanohttpd UPGRADE

Affected: <= 2.3.1

Fixed in: newer than 2.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nanohttpd || rpm -q nanohttpd || nanohttpd --version

2. UPGRADE to newer than 2.3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nanohttpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nanohttpd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-21230?

nanohttpd: upgrade to newer than 2.3.1. Exact commands for each OS are on this page.

Is CVE-2022-21230 being exploited?

CVE-2022-21230 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-21230 affect?

CVE-2022-21230 affects nanohttpd. Severity is medium (CVSS 5.5). This affects all versions of package org.nanohttpd:nanohttpd. Whenever an HTTP Session is parsing the body of an HTTP request, the body of the request is written to a RandomAccessFile when the it is larger than 1024 bytes. This file is crea

How urgent is CVE-2022-21230?

Priority 25/100. No elevated risk signals yet.

Software pages

Java vulnerabilities

Related CVEs

CVE-2020-13697 MEDIUM 6.1 UPGRADE An issue was discovered in RouterNanoHTTPD.java in NanoHTTPD through 2.3.1

References

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