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TI-2026-83914 Aliases CVE-2026-65059GHSA-m2rh-hmhf-hh5g

Memory exhaustion in Furl for Perl via unbounded decompression

Priority LOW 39CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Furl versions through 3.15 for Perl decompress HTTP response bodies with no size limit. The client inflates gzip, x-gzip and deflate response bodies and appends the output to the response string without any cap, even when the request did not ask for compression (CWE-409). A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands until it exhausts memory and ends the process.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.005 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Furlup to 3.15—No fix listedCNA
  • Furl Vendor— Affected up to 3.15 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Furl. Responses read with write_file or write_code are streamed rather than held in memory.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-65059
  2. 2026-11-02 Alias added: GHSA-m2rh-hmhf-hh5g
  3. 2026-11-06 CVSS score added · CISA ADP
  4. 2026-11-06 CISA SSVC decision points changed

References

Sources