How severe is CVE-2007-4767?

CVE-2007-4767 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2007-4767 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4767?

CVE-2007-4767 affects Pcre. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-4767?

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

When was CVE-2007-4767 published?

CVE-2007-4767 was published on 2007-11-07 and last updated on 2026-06-16.

CVE-2007-4767

CVE-2007-4767 is a medium-severity vulnerability in Pcre 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.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Pcre
Published: 2007-11-07
Last modified: 2026-06-16

Description

Perl-Compatible Regular Expression (PCRE) library before 7.3 does not properly compute the length of (1) a \p sequence, (2) a \P sequence, or (3) a \P{x} sequence, which allows context-dependent attackers to cause a denial of service (infinite loop or crash) or execute arbitrary code.

Frequently asked questions

What is CVE-2007-4767?: Perl-Compatible Regular Expression (PCRE) library before 7.3 does not properly compute the length of (1) a \p sequence, (2) a \P sequence, or (3) a \P{x} sequence, which allows context-dependent attackers to cause a denial of service (infinite loop or crash) or execute arbitrary code.
How severe is CVE-2007-4767?: CVE-2007-4767 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2007-4767 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4767?: CVE-2007-4767 affects Pcre. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-4767?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-4767 published?: CVE-2007-4767 was published on 2007-11-07 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:pcre:pcre:*:*:*:*:*:*:*:*

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