How severe is CVE-2009-0744?

CVE-2009-0744 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-0744 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0744?

CVE-2009-0744 affects Apple Safari. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-0744?

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

When was CVE-2009-0744 published?

CVE-2009-0744 was published on 2009-02-27 and last updated on 2026-06-16.

CVE-2009-0744

CVE-2009-0744 is a medium-severity vulnerability in Apple Safari 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: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apple Safari
Published: 2009-02-27
Last modified: 2026-06-16

Description

Apple Safari 4 Beta build 528.16 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a feeds: URI beginning with a (1) % (percent), (2) { (open curly bracket), (3) } (close curly bracket), (4) ^ (caret), (5) ` (backquote), or (6) | (pipe) character, followed by an & (ampersand) character.

Frequently asked questions

What is CVE-2009-0744?: Apple Safari 4 Beta build 528.16 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a feeds: URI beginning with a (1) % (percent), (2) { (open curly bracket), (3) } (close curly bracket), (4) ^ (caret), (5) ` (backquote), or (6) | (pipe) character, followed by an & (ampersand) character.
How severe is CVE-2009-0744?: CVE-2009-0744 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-0744 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0744?: CVE-2009-0744 affects Apple Safari. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-0744?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0744 published?: CVE-2009-0744 was published on 2009-02-27 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apple:safari:4.0:beta:*:*:*:*:*:*

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