Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77781
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 00:16:46 UTC
Updated2026-08-22 04:18:18 UTC
DescriptionTie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys. The FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions. Each method falls back to a regex match when the key is not already stored in the hash, compiling the caller's key with a bare qr// and no eval guard. A key that is not a valid regular expression pattern, such as a single unmatched bracket, dies. An application that looks up externally supplied strings in a tied hash will die on an invalid key.

Risk And Classification

Problem Types: CWE-248 | CWE-248 CWE-248 Uncaught Exception

References

ReferenceSourceLinkTags
metacpan.org/release/DAVECROSS/Tie-Hash-Regex-2.0.0/source/Changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
github.com/davorg-cpan/tie-hash-regex/commit/4239732cb76233543e2ded8ff5e... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
www.openwall.com/lists/oss-security/2026/08/22/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to Tie::Hash::Regex version 2.0.0 or later.

Workarounds

CNA: For deployments that cannot be upgraded, ensure that calls to check the existence of keys, fetch values from keys or delete keys are wrapped in an eval block.

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report