How severe is CVE-2009-2955?

CVE-2009-2955 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-2955 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2955?

CVE-2009-2955 primarily affects Google Chrome. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-2955?

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

When was CVE-2009-2955 published?

CVE-2009-2955 was published on 2009-08-24 and last updated on 2026-06-16.

CVE-2009-2955

CVE-2009-2955 is a medium-severity vulnerability in Google Chrome 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: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Google Chrome
Published: 2009-08-24
Last modified: 2026-06-16

Description

Google Chrome 1.0.154.48 and earlier allows remote attackers to cause a denial of service (CPU consumption and application hang) via JavaScript code with a long string value for the hash property (aka location.hash), a related issue to CVE-2008-5715.

Frequently asked questions

What is CVE-2009-2955?: Google Chrome 1.0.154.48 and earlier allows remote attackers to cause a denial of service (CPU consumption and application hang) via JavaScript code with a long string value for the hash property (aka location.hash), a related issue to CVE-2008-5715.
How severe is CVE-2009-2955?: CVE-2009-2955 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-2955 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2955?: CVE-2009-2955 primarily affects Google Chrome. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-2955?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-2955 published?: CVE-2009-2955 was published on 2009-08-24 and last updated on 2026-06-16.

References

Affected products (17)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.2.149.27:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.2.149.29:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.2.149.30:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.2.152.1:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.2.153.1:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.3.154.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.3.154.3:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.4.154.18:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.4.154.22:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.4.154.31:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:0.4.154.33:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:1.0.154.36:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:1.0.154.39:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:1.0.154.42:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:1.0.154.43:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:1.0.154.46:*:*:*:*:*:*:*

More vulnerabilities in Google Chrome

CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2015-8548 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in Google V8 before 4.7.80.23, as used in Google Chrome before 47.0.2526.80, allow…
CVE-2015-6791 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in Google Chrome before 47.0.2526.80 allow attackers to cause a denial of service…
CVE-2015-6788 — Critical (CVSS 10.0): The ObjectBackedNativeHandler class in extensions/renderer/object_backed_native_handler.cc in the extensions subsystem…
CVE-2015-8480 — Critical (CVSS 10.0): The VideoFramePool::PoolImpl::CreateFrame function in media/base/video_frame_pool.cc in Google Chrome before…
CVE-2015-6787 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in Google Chrome before 47.0.2526.73 allow attackers to cause a denial of service…

All CVEs affecting Google Chrome →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →