CVE-2008-5679: The HTML parsing engine in Opera before 9.63 allows remote attackers to execute arbitrary code via crafted web

Q: How do I fix CVE-2008-5679?

opera: upgrade to newer than 9.62. Exact commands for each OS are on this page.

Q: Is CVE-2008-5679 being exploited?

CVE-2008-5679 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2008-5679 affect?

CVE-2008-5679 affects opera. Severity is high (CVSS 9.3). The HTML parsing engine in Opera before 9.63 allows remote attackers to execute arbitrary code via crafted web pages that trigger an invalid pointer calculation and heap corruption.

Q: How urgent is CVE-2008-5679?

Priority 55/100. Critical severity

This month

HIGH 9.3UPGRADE

CVE-2008-5679 is a high-severity flaw (CVSS 9.3) affecting opera. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The HTML parsing engine in Opera before 9.63 allows remote attackers to execute arbitrary code via crafted web pages that trigger an invalid pointer calculation and heap corruption.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (High)
EPSS exploit chance	3.3% (top 12%)
CISA exploited list	No
Weakness	CWE-399
Published	2008-12-19
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: opera

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2008-12-19 16:30 UTCPublished CVE record published
2026-06-16 23:00 UTCUpdated Record last modified

opera opera UPGRADE

Affected: all versions · <= 9.62 · 5..10 · 5.0 · 5.0 beta_2 · 5.0 beta_3 · 5.0 beta_4 · 5.0 beta_5

Fixed in: newer than 9.62

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy opera || rpm -q opera || opera --version

2. UPGRADE to newer than 9.62 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade opera

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade opera

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2008-5679?

opera: upgrade to newer than 9.62. Exact commands for each OS are on this page.

Is CVE-2008-5679 being exploited?

CVE-2008-5679 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2008-5679 affect?

CVE-2008-5679 affects opera. Severity is high (CVSS 9.3). The HTML parsing engine in Opera before 9.63 allows remote attackers to execute arbitrary code via crafted web pages that trigger an invalid pointer calculation and heap corruption.

How urgent is CVE-2008-5679?

Priority 55/100. Critical severity

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References

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