CVE-2026-45137: Anchor is a framework providing several convenient developer tools for writing Solana programs

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HIGH 8.2REMOTEUPGRADE

CVE-2026-45137 is a high-severity flaw (CVSS 8.2) affecting anchor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Anchor is a framework providing several convenient developer tools for writing Solana programs. From 1.0.0 to before 1.0.2, an logic error causes anchor programs to accept any program id when requiring the system program id, causing false assumptions resulting in potential arbitrary cpi in programs that invoke system program instructions. In the TryFrom<&'a AccountInfo<'a>> implementation for Program<'a, T>, the id of T is compared with Pubkey::d

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-05-27
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: anchor-lang

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-27 21:16 UTCPublished CVE record published
2026-10-26 12:10 UTCUpdated Record last modified

anchor-lang anchor UPGRADE

Affected: >= 1.0.0 and < 1.0.2

Fixed in: 1.0.2

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to 1.0.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade anchor

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 1.0.0 (Debian / Ubuntu)

apt-cache madison anchor sudo apt install anchor=<VERSION_BEFORE_1.0.0> sudo apt-mark hold anchor

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

dnf --showduplicates list anchor sudo dnf downgrade anchor-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add anchor

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-2026-45137?

anchor: upgrade to 1.0.2. Exact commands for each OS are on this page.

Is CVE-2026-45137 being exploited?

CVE-2026-45137 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-2026-45137 affect?

CVE-2026-45137 affects anchor. Severity is high (CVSS 8.2). Anchor is a framework providing several convenient developer tools for writing Solana programs. From 1.0.0 to before 1.0.2, an logic error causes anchor programs to accept any program id when requiring the system program id, causing false a

How urgent is CVE-2026-45137?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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