CVE-2023-48703: RobotsAndPencils go-saml, a SAML client library written in Go, contains an authentication bypass vulnerability

This month

HIGH 7.5REMOTEMITIGATE

CVE-2023-48703 is a high-severity flaw (CVSS 7.5) affecting go-saml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

RobotsAndPencils go-saml, a SAML client library written in Go, contains an authentication bypass vulnerability in all known versions. This is due to how the `xmlsec1` command line tool is called internally to verify the signature of SAML assertions. When `xmlsec1` is used without defining the enabled key data, the origin of the public key for the signature verification is, unfortunately, not restricted. That means an attacker can sign the SAML as

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	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-287
Published	2024-03-06
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2024-03-06 20:15 UTCPublished CVE record published
2026-06-17 06:34 UTCUpdated Record last modified

robotsandpencils go-saml MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy go-saml || rpm -q go-saml || go-saml --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2023-48703?

go-saml: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-48703 being exploited?

CVE-2023-48703 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-2023-48703 affect?

CVE-2023-48703 affects go-saml. Severity is high (CVSS 7.5). RobotsAndPencils go-saml, a SAML client library written in Go, contains an authentication bypass vulnerability in all known versions. This is due to how the `xmlsec1` command line tool is called internally to verify the signature of SAML as

How urgent is CVE-2023-48703?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

References

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