CVE-2025-48976: Allocation of resources for multipart headers with insufficient limits enabled a DoS vulnerability in Apache C

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HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2025-48976 is a high-severity flaw (CVSS 7.5) affecting commons fileupload. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Allocation of resources for multipart headers with insufficient limits enabled a DoS vulnerability in Apache Commons FileUpload. This issue affects Apache Commons FileUpload: from 1.0 before 1.6; from 2.0.0-M1 before 2.0.0-M4. Users are recommended to upgrade to versions 1.6 or 2.0.0-M4, which fix the issue.

Why this priority

High severity
EPSS top 2%: very likely to be exploited
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	32.9% (top 2%)
CISA exploited list	No
Weakness	CWE-770
Published	2025-06-16
Last modified	2026-06-17

Publisher (CNA): Apache Software Foundation · Vendor: apache

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

Am I affected?

Timeline

2025-06-16 15:15 UTCPublished CVE record published
2026-06-17 09:30 UTCUpdated Record last modified

apache commons fileupload UPGRADE

Affected: >= 1.0 and < 1.6 · 2.0.0 m1 · 2.0.0 m1-rc1 · 2.0.0 m2 · 2.0.0 m2-rc1 · 2.0.0 m3 · 2.0.0 m3-rc1

Fixed in: 1.6

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy commons-fileupload || rpm -q commons-fileupload || commons-fileupload --version

2. UPGRADE to 1.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade commons-fileupload

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade commons-fileupload

Note

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

3. If no update is available yet, DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison commons-fileupload sudo apt install commons-fileupload=<VERSION_BEFORE_1.0> sudo apt-mark hold commons-fileupload

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list commons-fileupload sudo dnf downgrade commons-fileupload-<VERSION_BEFORE_1.0> sudo dnf versionlock add commons-fileupload

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-48976?

commons fileupload: upgrade to 1.6. Exact commands for each OS are on this page.

Is CVE-2025-48976 being exploited?

CVE-2025-48976 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-2025-48976 affect?

CVE-2025-48976 affects commons fileupload. Severity is high (CVSS 7.5). Allocation of resources for multipart headers with insufficient limits enabled a DoS vulnerability in Apache Commons FileUpload. This issue affects Apache Commons FileUpload: from 1.0 before 1.6; from 2.0.0-M1 before 2.0.0-M4. Users are r

How urgent is CVE-2025-48976?

Priority 61/100. High severity; EPSS top 2%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

References

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