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Vulnerabilities

Vulnerability · CVE-2025-68156

Expr is an expression language and expression evaluation for Go.

Published Dec 16, 2025 · catalog updated Dec 16, 2025 · Expr is an expression

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-68156. EPSS is 0.42%. Act only if a listed version of Expr is an expression is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Expr is an expression).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.42%
Remediation
Version ranges on file
Affected products
vendor expr-lang expr < 1.17.7

Expr is an expression language and expression evaluation for Go. Prior to version 1.17.7, several builtin functions in Expr, including , , , , and , perform recursive traversal over user-provided data structures without enforcing a maximum recursion depth. If the evaluation environment contains deeply nested or cyclic data structures, these functions may recurse indefinitely until exceed the Go runtime stack limit. This results in a stack overflow panic, causing the host application to crash. While exploitability depends on whether an attacker can influence or inject cyclic or pathologically d

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor expr-lang expr < 1.17.7< 1.17.7

How to fix CVE-2025-68156

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-68156. EPSS is 0.42%. Act only if a listed version of Expr is an expression is installed.

Which versions are affected?

Compare what you have installed with expr-lang expr < 1.17.7 < 1.17.7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.42%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 16, 2025 · EUVD

    Detected

    Expr is an expression language and expression evaluation for Go. Prior to version 1.17.7, several builtin functions in Expr, including , , , , and , perform recursive traversal over user-provided data structures without enforcing a maximum recursion depth. If the evaluation environment contains deeply nested or cyclic data structures, these functions may recurse indefinitely until exceed the Go ru

  2. Dec 16, 2025 · EUVD

    Updated

    Expr is an expression language and expression evaluation for Go. Prior to version 1.17.7, several builtin functions in Expr, including , , , , and , perform recursive traversal over user-provided data structures without enforcing a maximum recursion depth. If the evaluation environment contains deeply nested or cyclic data structures, these functions may recurse indefinitely until exceed the Go ru

Sources

  • CVE.orgVulnerability recordCVE-2025-68156

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-68156

    30-day exploitation probability 0.42%

    first.org
  • EUVDVulnerability recordEUVD-2025-203831

    Expr is an expression language and expression evaluation for Go. Prior to version 1.17.7, several builtin functions in Expr, including , , , , and , perform recursive traversal over user-provided data structures without enforcing a maximum recursion depth. If the evaluation envir

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 2, 2026
  • CVE.orgNov 2, 2026
  • EUVDNov 1, 2026