# CVE-2026-30910: Crypt::Sodium::XS versions through 0.001000 for Perl has potential integer overflows

> Integer overflows in Crypt::Sodium::XS can cause buffer overflows or crashes when processing extremely large inputs, potentially leading to code execution or denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Mar 2026
- **Updated:** 10 Mar 2026
- **Also known as:** GHSA-2qjg-jrhf-99vr

## What is CVE-2026-30910?

CVE-2026-30910 is a high-severity vulnerability in IAMB Crypt::Sodium::XS, published on 8 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Crypt::Sodium::XS versions through 0.001000 for Perl has potential integer overflows.

Combined aead encryption, combined signature creation, and bin2hex functions do not check that output size will be less than SIZE_MAX, which could lead to integer wraparound causing an undersized output buffer. This can cause a crash in bin2hex and encryption algorithms other than aes256gcm. For aes256gcm encryption and signatures, an undersized buffer could lead to buffer overflow.

Encountering this issue is unlikely as the message length would need to be very large.

For bin2hex the input size would have to be > SIZE_MAX / 2 For aegis encryption the input size would need to be > SIZE_MAX - 32U For other encryption the input size would need to be > SIZE_MAX - 16U For signatures the input size would need to be > SIZE_MAX - 64U

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-30910?

It affects 1 product.


Products: Iamb Crypt\.

## How do I fix CVE-2026-30910?

No fix has been published for CVE-2026-30910 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-30910 being exploited?

There is no known exploitation of CVE-2026-30910 in the wild and no public exploit code.

## Other vulnerabilities in IAMB Crypt::Sodium::XS

- [CVE-2025-15444](https://insights.sbomify.com/CVE-2025-15444/): Crypt::Sodium::XS module versions prior to 0.000042, for Perl, include a vulnerable version of libsodium (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-30910 and fix it if it is affected.

What it is: CVE-2026-30910 is a high-severity vulnerability in IAMB Crypt::Sodium::XS, published on 8 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-30910 in the wild and no public exploit code.

Affected product: IAMB Crypt::Sodium::XS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-30910/ (Markdown: https://insights.sbomify.com/CVE-2026-30910/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-30910
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30910
- OSV: https://osv.dev/vulnerability/CVE-2026-30910

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-30910/
Summaries are generated and may contain mistakes; the official description above is the record.