How severe is CVE-2022-30780?

CVE-2022-30780 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-30780 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 56% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-30780?

CVE-2022-30780 primarily affects Lighttpd. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-30780?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-30780 published?

CVE-2022-30780 was published on 2022-06-11 and last updated on 2026-06-17.

CVE-2022-30780

CVE-2022-30780 is a high-severity vulnerability in Lighttpd with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 56% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-682.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 56% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-682
Affected product: Lighttpd
Published: 2022-06-11
Last modified: 2026-06-17

Description

Lighttpd 1.4.56 through 1.4.58 allows a remote attacker to cause a denial of service (CPU consumption from stuck connections) because connection_read_header_more in connections.c has a typo that disrupts use of multiple read operations on large headers.

Frequently asked questions

What is CVE-2022-30780?: Lighttpd 1.4.56 through 1.4.58 allows a remote attacker to cause a denial of service (CPU consumption from stuck connections) because connection_read_header_more in connections.c has a typo that disrupts use of multiple read operations on large headers.
How severe is CVE-2022-30780?: CVE-2022-30780 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-30780 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 56% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-30780?: CVE-2022-30780 primarily affects Lighttpd. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-30780?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-30780 published?: CVE-2022-30780 was published on 2022-06-11 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:lighttpd:lighttpd:1.4.56:*:*:*:*:*:*:*
cpe:2.3:a:lighttpd:lighttpd:1.4.57:*:*:*:*:*:*:*
cpe:2.3:a:lighttpd:lighttpd:1.4.58:*:*:*:*:*:*:*

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