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01 Record

CVE-2026-65065

Data::RoaringBitmap::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW

MediumPUBLISHEDCNA: CPANSec
CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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02 Description

Data::RoaringBitmap::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.15% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 4.1% of scored records. A rank, not a probability.
NVD base score
5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-10-24.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-21 19:08Z3 MO AGO
Last updated
2026-07-27 14:07Z3 MO AGO
Reserved
2026-07-21
Assigning CNA
CPANSec
Record state
PUBLISHED
Severity
Medium (CVSS 5.5)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
  • CWE-59Improper Link Resolution Before File Access ('Link Following')Base
  • CWE-732Incorrect Permission Assignment for Critical ResourceClass
Data version
5.2
Document digest
c16350057785a2803c0909b06145cde6722230ade6c425806e0d5598764ef19d

05 Affected products

VendorProductVersionsPlatforms
EGORData::RoaringBitmap::Shared0 to < 0.02—

06 References

07 Remediation

Upgrade to Data::RoaringBitmap::Shared 0.02 or later, which creates the backing file mode 0600 (owner-only) with O_EXCL and O_NOFOLLOW.