XML::Parser versions through 2.45 for Perl could overflow the pre-allocated buffer size cause a heap corruption (double free or corruption) and crashes
XML::Parser versions through 2.45 for Perl could overflow the pre-allocated buffer size cause a heap corruption (double free or corruption) and crashes. A :utf8 PerlIO layer, parse_stream() in Expat.xs could overflow the XML input buffer because Perl's read() returns decoded characters while SvPV() gives back multi-byte UTF-8 bytes that can exceed the pre-allocated buffer size. This can cause heap corruption (double free or corruption) and crashes.
- BDU:2026-12813
- ALSA-2026:7679
- ALSA-2026:7680
- ALSA-2026:7681
- openSUSE-SU-2026:10527-1
- openSUSE-SU-2026:20459-1
- RHSA-2026:7679
- RHSA-2026:7680
- RHSA-2026:7681
- RHSA-2026:8577
- RHSA-2026:8578
- RHSA-2026:8608
- RHSA-2026:8609
- RHSA-2026:8610
- RHSA-2026:9110
- RHSA-2026:9246
- RHSA-2026:9258
- RHSA-2026:9259
- RHSA-2026:9605
- RLSA-2026:7679
- Published
- Mar 19, 2026
- Updated
- Jun 16, 2026
- EPSS
- 0.6% · 47th percentile
- CWE
- CWE-122
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| toddr | xml\ | cpe:2.3:a:toddr:xml\ |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- toddr xml::parserbefore 2.48
Versions reported by the vendor
Affected version ranges reported by the assigning authority (CPANSec). Independent of NVD's CPE analysis and usually ahead of it.
TODDR XML::Parser
- up to and including 2.45affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | perl-XML-Parser | before 2.47-6.1.el10_1 | 2.47-6.1.el10_1 |
| AlmaLinux:8 | perl-XML-Parser | before 2.44-12.el8_10 | 2.44-12.el8_10 |
| AlmaLinux:9 | perl-XML-Parser | before 2.46-9.1.el9_7 | 2.46-9.1.el9_7 |
| Debian:12 | libxml-parser-perl | before 2.46-1 | 2.46-1 |
| openSUSE:Leap 16.0 | perl-XML-Parser | before 2.470.0-160000.3.1 | 2.470.0-160000.3.1 |
| openSUSE:Tumbleweed | perl-XML-Parser | before 2.570.0-1.1 | 2.570.0-1.1 |
| Red Hat:enterprise_linux_eus:10.0 | perl-XML-Parser | before 0:2.47-6.el10_0.1 | 0:2.47-6.el10_0.1 |
| Red Hat:enterprise_linux_eus:10.0 | perl-XML-Parser-debuginfo | before 0:2.47-6.el10_0.1 | 0:2.47-6.el10_0.1 |
| Red Hat:enterprise_linux_eus:10.0 | perl-XML-Parser-debugsource | before 0:2.47-6.el10_0.1 | 0:2.47-6.el10_0.1 |
| Red Hat:enterprise_linux:10.1 | perl-XML-Parser | before 0:2.47-6.1.el10_1 | 0:2.47-6.1.el10_1 |
| Red Hat:enterprise_linux:10.1 | perl-XML-Parser-debuginfo | before 0:2.47-6.1.el10_1 | 0:2.47-6.1.el10_1 |
| Red Hat:enterprise_linux:10.1 | perl-XML-Parser-debugsource | before 0:2.47-6.1.el10_1 | 0:2.47-6.1.el10_1 |
| Red Hat:enterprise_linux:8::appstream | perl-XML-Parser | before 0:2.44-12.el8_10 | 0:2.44-12.el8_10 |
| Red Hat:enterprise_linux:8::appstream | perl-XML-Parser-debuginfo | before 0:2.44-12.el8_10 | 0:2.44-12.el8_10 |
| Red Hat:enterprise_linux:8::appstream | perl-XML-Parser-debugsource | before 0:2.44-12.el8_10 | 0:2.44-12.el8_10 |
| Red Hat:enterprise_linux:9::appstream | perl-XML-Parser | before 0:2.46-9.1.el9_7 | 0:2.46-9.1.el9_7 |
| Red Hat:enterprise_linux:9::appstream | perl-XML-Parser-debuginfo | before 0:2.46-9.1.el9_7 | 0:2.46-9.1.el9_7 |
| Red Hat:enterprise_linux:9::appstream | perl-XML-Parser-debugsource | before 0:2.46-9.1.el9_7 | 0:2.46-9.1.el9_7 |
| Red Hat:rhel_aus:8.2::appstream | perl-XML-Parser | before 0:2.44-11.el8_2.1 | 0:2.44-11.el8_2.1 |
| Red Hat:rhel_aus:8.2::appstream | perl-XML-Parser-debuginfo | before 0:2.44-11.el8_2.1 | 0:2.44-11.el8_2.1 |
| Red Hat:rhel_aus:8.2::appstream | perl-XML-Parser-debugsource | before 0:2.44-11.el8_2.1 | 0:2.44-11.el8_2.1 |
| Red Hat:rhel_aus:8.4::appstream | perl-XML-Parser | before 0:2.44-11.el8_4.1 | 0:2.44-11.el8_4.1 |
| Red Hat:rhel_aus:8.4::appstream | perl-XML-Parser-debuginfo | before 0:2.44-11.el8_4.1 | 0:2.44-11.el8_4.1 |
| Red Hat:rhel_aus:8.4::appstream | perl-XML-Parser-debugsource | before 0:2.44-11.el8_4.1 | 0:2.44-11.el8_4.1 |
+27
Same product
toddr: all recordsOther highest-scoring records for the same primary product.
- CVE-2006-10003XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:perl-XML-Parser | 2.46-9.1.el9_7 · AlmaLinux:9 | Package registry (OSV) |
| debian:libxml-parser-perl | 2.46-1 · Debian:12 | Package registry (OSV) |
| opensuse:perl-XML-Parser | 2.44-150000.3.3.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:perl-XML-Parser | 0:2.46-9.1.el9_7 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:perl-XML-Parser-debuginfo | 0:2.46-9.1.el9_7 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:perl-XML-Parser-debugsource | 0:2.46-9.1.el9_7 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| rocky linux:perl-XML-Parser | 0:2.46-9.1.el9_7 · Rocky Linux:9 | Package registry (OSV) |
| suse:perl-XML-Parser | 2.41-23.3.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:perl-XML-Parser | 2.44-150000.3.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2006-100030 days apartXML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack39Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-122 · Heap-based Buffer OverflowCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/cpan-authors/XML-Parser/commit/56b0509dfc6b559cd7555ea81ee62e3622069255.patch
- github.com/cpan-authors/XML-Parser/issues/64
- metacpan.org/release/TODDR/XML-Parser-2.46/changes
- rt.cpan.org/Ticket/Display.html?id=19859
- www.openwall.com/lists/oss-security/2026/03/19/1
- www.openwall.com/lists/oss-security/2026/03/22/3
Vendor advisories and official records. Exploit/PoC links are deliberately left out.