CVE-2026-24783: soroban-fixed-point-math is a fixed-point math library for Soroban smart contacts

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2026-24783 is a high-severity flaw (CVSS 7.5) affecting soroban-fixed-point-math. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

soroban-fixed-point-math is a fixed-point math library for Soroban smart contacts. In versions 1.3.0 and 1.4.0, the `mulDiv(x, y, z)` function incorrectly handled cases where both the intermediate product $x * y$ and the divisor $z$ were negative. The logic assumed that if the intermediate product was negative, the final result must also be negative, neglecting the sign of $z$. This resulted in rounding being applied in the wrong direction for ca

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-682
Published	2026-01-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: script3

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

Am I affected?

Timeline

2026-01-27 22:15 UTCPublished CVE record published
2026-06-17 10:23 UTCUpdated Record last modified

script3 soroban-fixed-point-math DOWNGRADE

Affected: 1.3.0 · 1.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.0

1. Check installed version

apt-cache policy soroban-fixed-point-math || rpm -q soroban-fixed-point-math || soroban-fixed-point-math --version

2. No fixed release: DOWNGRADE to a release before 1.3.0 (Debian / Ubuntu)

apt-cache madison soroban-fixed-point-math sudo apt install soroban-fixed-point-math=<VERSION_BEFORE_1.3.0> sudo apt-mark hold soroban-fixed-point-math

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list soroban-fixed-point-math sudo dnf downgrade soroban-fixed-point-math-<VERSION_BEFORE_1.3.0> sudo dnf versionlock add soroban-fixed-point-math

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-2026-24783?

soroban-fixed-point-math: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-24783 being exploited?

CVE-2026-24783 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-2026-24783 affect?

CVE-2026-24783 affects soroban-fixed-point-math. Severity is high (CVSS 7.5). soroban-fixed-point-math is a fixed-point math library for Soroban smart contacts. In versions 1.3.0 and 1.4.0, the `mulDiv(x, y, z)` function incorrectly handled cases where both the intermediate product $x * y$ and the divisor $z$ were ne

How urgent is CVE-2026-24783?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

References

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