How severe is CVE-2026-58471?

CVE-2026-58471 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2026-58471 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-58471?

CVE-2026-58471 affects Gnu Wget. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-58471?

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

When was CVE-2026-58471 published?

CVE-2026-58471 was published on 2026-07-07 and last updated on 2026-07-09.

CVE-2026-58471

CVE-2026-58471 is a medium-severity vulnerability in Gnu Wget with a CVSS 3.x base score of 5.9. 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-122.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v4: 6.0
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-122
Affected product: Gnu Wget
Published: 2026-07-07
Last modified: 2026-07-09

Description

GNU Wget through 1.25.0, fixed in commit c2640fe, contains a heap buffer overflow vulnerability in the convert_fname() function within src/url.c that allows remote attackers to trigger memory corruption through a server-supplied filename requiring character set conversion. When the output buffer is too small during iconv E2BIG reallocation, the reallocation logic miscalculates the remaining space, leading to a heap buffer overflow that can be exploited via a maliciously crafted server response.

Frequently asked questions

What is CVE-2026-58471?: GNU Wget through 1.25.0, fixed in commit c2640fe, contains a heap buffer overflow vulnerability in the convert_fname() function within src/url.c that allows remote attackers to trigger memory corruption through a server-supplied filename requiring character set conversion. When the output buffer is too small during iconv E2BIG reallocation, the reallocation logic miscalculates the remaining space, leading to a heap buffer overflow that can be exploited via a maliciously crafted server response.
How severe is CVE-2026-58471?: CVE-2026-58471 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2026-58471 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-58471?: CVE-2026-58471 affects Gnu Wget. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-58471?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-58471 published?: CVE-2026-58471 was published on 2026-07-07 and last updated on 2026-07-09.

References

Affected products (1)

cpe:2.3:a:gnu:wget:*:*:*:*:*:*:*:*

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