How severe is CVE-2008-0171?

CVE-2008-0171 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-0171 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-0171?

CVE-2008-0171 primarily affects Boost. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-0171?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-0171 published?

CVE-2008-0171 was published on 2008-01-17 and last updated on 2026-06-16.

CVE-2008-0171

CVE-2008-0171 is a medium-severity vulnerability in Boost with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Boost
Published: 2008-01-17
Last modified: 2026-06-16

Description

regex/v4/perl_matcher_non_recursive.hpp in the Boost regex library (aka Boost.Regex) in Boost 1.33 and 1.34 allows context-dependent attackers to cause a denial of service (failed assertion and crash) via an invalid regular expression.

Frequently asked questions

What is CVE-2008-0171?: regex/v4/perl_matcher_non_recursive.hpp in the Boost regex library (aka Boost.Regex) in Boost 1.33 and 1.34 allows context-dependent attackers to cause a denial of service (failed assertion and crash) via an invalid regular expression.
How severe is CVE-2008-0171?: CVE-2008-0171 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-0171 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-0171?: CVE-2008-0171 primarily affects Boost. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-0171?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-0171 published?: CVE-2008-0171 was published on 2008-01-17 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:boost:boost:1.33:*:*:*:*:*:*:*
cpe:2.3:a:boost:boost:1.34:*:*:*:*:*:*:*
cpe:2.3:a:boost:boost_regex_library:*:*:*:*:*:*:*:*

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