CVE-2026-32322: soroban-sdk is a Rust SDK for Soroban contracts

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-32322 is a medium-severity flaw (CVSS 5.3) affecting rs-soroban-sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

soroban-sdk is a Rust SDK for Soroban contracts. Prior to 22.0.11, 23.5.3, and 25.3.0, The Fr (scalar field) types for BN254 and BLS12-381 in soroban-sdk compared values using their raw U256 representation without first reducing modulo the field modulus r. This caused mathematically equal field elements to compare as not-equal when one or both values were unreduced (i.e., >= r). The vulnerability requires an attacker to supply crafted Fr values t

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-697
Published	2026-03-13
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-03-13 19:54 UTCPublished CVE record published
2026-06-17 10:35 UTCUpdated Record last modified

stellar rs-soroban-sdk UPGRADE

Affected: < 22.0.11 · >= 23.0.0 and < 23.5.3 · >= 25.0.0 and < 25.3.0

Fixed in: 22.0.11, 23.5.3, 25.3.0

Safe to downgrade to: a release before 23.0.0

1. Check installed version

apt-cache policy rs-soroban-sdk || rpm -q rs-soroban-sdk || rs-soroban-sdk --version

2. UPGRADE to 22.0.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rs-soroban-sdk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rs-soroban-sdk

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 23.0.0 (Debian / Ubuntu)

apt-cache madison rs-soroban-sdk sudo apt install rs-soroban-sdk=<VERSION_BEFORE_23.0.0> sudo apt-mark hold rs-soroban-sdk

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

dnf --showduplicates list rs-soroban-sdk sudo dnf downgrade rs-soroban-sdk-<VERSION_BEFORE_23.0.0> sudo dnf versionlock add rs-soroban-sdk

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-2026-32322?

rs-soroban-sdk: upgrade to 22.0.11, 23.5.3, 25.3.0. Exact commands for each OS are on this page.

Is CVE-2026-32322 being exploited?

CVE-2026-32322 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-2026-32322 affect?

CVE-2026-32322 affects rs-soroban-sdk. Severity is medium (CVSS 5.3). soroban-sdk is a Rust SDK for Soroban contracts. Prior to 22.0.11, 23.5.3, and 25.3.0, The Fr (scalar field) types for BN254 and BLS12-381 in soroban-sdk compared values using their raw U256 representation without first reducing modulo the

How urgent is CVE-2026-32322?

Priority 29/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-24889 MEDIUM 5.3 UPGRADE soroban-sdk is a Rust SDK for Soroban contracts

References

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