CVE-2026-104712: Asymmetric resource consumption (amplification) vulnerability in Apache Struts

This month

HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2026-104712 is a high-severity flaw (CVSS 7.5) affecting struts. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic

Why this priority

High severity
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	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-405
Published	2026-10-05
Last modified	2026-10-08

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

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-05 19:17 UTCPublished CVE record published
2026-10-08 19:11 UTCUpdated Record last modified

apache struts UPGRADE

Affected: >= 2.5.14 and <= 2.5.33 · >= 6.0.0 and < 6.12.0 · >= 7.0.0 and < 7.4.0

Fixed in: 6.12.0, 7.4.0

Safe to downgrade to: a release before 2.5.14

1. Check installed version

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

2. UPGRADE to 6.12.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade struts

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 2.5.14 (Debian / Ubuntu)

apt-cache madison struts sudo apt install struts=<VERSION_BEFORE_2.5.14> sudo apt-mark hold struts

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

dnf --showduplicates list struts sudo dnf downgrade struts-<VERSION_BEFORE_2.5.14> sudo dnf versionlock add struts

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-2026-104712?

struts: upgrade to 6.12.0, 7.4.0. Exact commands for each OS are on this page.

Is CVE-2026-104712 being exploited?

CVE-2026-104712 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-2026-104712 affect?

CVE-2026-104712 affects struts. Severity is high (CVSS 7.5). Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the fr

How urgent is CVE-2026-104712?

Priority 51/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache Struts vulnerabilities · Java vulnerabilities

Related CVEs

CVE-2026-104714 HIGH 8.8 UPGRADE Concurrent execution using shared resource with improper synchronization ('race condition') vulnerability in A
CVE-2026-104713 MEDIUM 6.5 UPGRADE Allocation of resources without limits or throttling vulnerability in the Apache Struts REST plugin
CVE-2026-104711 CRITICAL 9.8 UPGRADE Improper neutralization of special elements used in an expression language statement ('Expression Language Inj

References

← Back to latest CVEs