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CVE-2026-65059

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses

7.5 High

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses.

Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory.

A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.50%Up 0.3 points since Nov 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses.

Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory.

A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Record
CVE-2026-65059
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-409
Updated
2026-11-06
EUVDEUVD-2026-115332 7.5

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses.

Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory.

A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Record
EUVD-2026-115332
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-06
GitHub AdvisoriesGHSA-m2rh-hmhf-hh5g 7.5

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP...

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses.

Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory.

A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Record
GHSA-m2rh-hmhf-hh5g
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-409
Updated
2026-11-06
NVD 7.5

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses.

Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory.

A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Record
CVE-2026-65059
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-409
Updated
2026-11-06
OSV 7.5

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses.

Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory.

A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Record
CVE-2026-65059
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-409
Updated
2026-11-07
OSVDEBIAN-CVE-2026-65059 7.5

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses. Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory. A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Record
DEBIAN-CVE-2026-65059
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-07
OSVUBUNTU-CVE-2026-65059 No score

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses. Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory. A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Record
UBUNTU-CVE-2026-65059
Updated
2026-11-05

Affected packages

Affected packages
PackageAffectedFixed
libfurl-perl
Debian:12
All versions, plus listed versions
3.14-23.15-13.15-2
None known
libfurl-perl
Debian:13
All versions, plus listed versions
3.14-23.15-13.15-2
None known
libfurl-perl
Debian:14
All versions, plus listed versions
3.14-23.15-13.15-2
None known
libfurl-perl
Ubuntu:16.04:LTS
All versions, plus listed versions
3.06-23.08-1
None known
libfurl-perl
Ubuntu:18.04:LTS
All versions, plus listed versions
3.08-23.13-1
None known
libfurl-perl
Ubuntu:20.04:LTS
All versions, plus listed versions
3.13-2
None known
libfurl-perl
Ubuntu:22.04:LTS
All versions, plus listed versions
3.13-23.14-13.14-2
None known
libfurl-perl
Ubuntu:24.04:LTS
All versions, plus listed versions
3.14-2
None known
libfurl-perl
Ubuntu:26.10
All versions, plus listed versions
3.15-1
None known
libfurl-perl
Ubuntu:26.04:LTS
All versions, plus listed versions
3.14-23.15-1
None known

History

History
RecordedChangedSources
affectedEUVD, GitHub Advisories, NVD, OSV
severityCVE List, OSV
affected, aliases, referencesOSV
factsOSV
referencesOSV
aliases, publishedEUVD
referencesOSV
affected, aliases, referencesCVE List, GitHub Advisories, NVD, OSV
first indexedCVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-65059 is a high vulnerability (CVSS 7.5) in libfurl-perl, published November 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 43rd percentile. No source names a fixed version.

References

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