Text::CSV_XS versions before 1.62 for Perl have a use-after-free when registered callbacks extend the Perl argument stack, which may enable type confusion or memory corruption

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Summary

CVECVE-2026-7111
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-29 15:16:09 UTC
Updated2026-05-06 16:16:52 UTC
DescriptionText::CSV_XS versions before 1.62 for Perl have a use-after-free when registered callbacks extend the Perl argument stack, which may enable type confusion or memory corruption. The Parse, print, getline, and getline_all methods invoke registered callbacks (for example after_parse, before_print, or on_error) and cache the Perl argument stack pointer across the call. If a callback extends the argument stack enough to trigger a reallocation, the return value is written through the stale pointer into the freed buffer, and the caller reads the original $self argument as the return value instead. Calling code that expects parsed data from getline_all receives the Text::CSV_XS object in its place, leading to logic errors or crashes. Text::CSV_XS objects used without any registered callbacks are not affected.

Risk And Classification

Primary CVSS: v3.1 8.4 HIGH from ADP

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000180000 probability, percentile 0.048750000 (date 2026-05-05)

Problem Types: CWE-416 | CWE-825 | CWE-825 CWE-825 Expired Pointer Dereference | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Hmbrand Text \ csv_xs All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA HMBRAND TextCSV XS affected 1.62 custom Not specified

References

ReferenceSourceLinkTags
github.com/cpan-authors/Text-CSV_XS/commit/c17f31a5f2bf36674748eb4b6e256... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com Mailing List, Patch
metacpan.org/release/HMBRAND/Text-CSV_XS-1.62/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org Release Notes, Product
www.openwall.com/lists/oss-security/2026/04/29/17 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Leon Timmermans (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-25T00:00:00.000ZFix committed to public Github repository
CNA2026-04-26T00:00:00.000ZCVE number reserved
CNA2026-04-29T00:00:00.000ZVersion 1.62 with the fix released to CPAN

Solutions

CNA: Upgrade to 1.62 or later.

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