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ALSA-2026:67463
Vulnerability from osv_almalinux
Published
2026-09-14 00:00
Modified
2026-09-15 08:42
Summary
Important: rsync security, bug fix, and enhancement update
Details
The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.
Security Fix(es):
- rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)
- rsync: rsync: TLS Certificate Validation Bypass allows interception of encrypted sessions (CVE-2026-70454)
- rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)
- rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)
- rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)
- rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)
- rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)
- rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)
- rsync: rsync: Authorization bypass via
auth usersdirective parsing (CVE-2026-70463) - rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)
- rsync: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (CVE-2026-53791)
- rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)
- rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)
- rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)
- rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)
- rsync: rsync: Denial of Service via Zstandard compression thread exhaustion (CVE-2026-70455)
- rsync: rsync: Memory corruption via out-of-bounds write in size parsing (CVE-2026-70457)
- rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)
- rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)
- rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)
- rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)
Bug Fix(es) and Enhancement(s):
- Rebase rsync to version 3.5.0 in AlmaLinux10 (JIRA:AlmaLinux-246094)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
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}
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"details": "The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool. \n\nSecurity Fix(es): \n\n * rsync: rsync 2.3.3 \u003c 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)\n * rsync: rsync: TLS Certificate Validation Bypass allows interception of encrypted sessions (CVE-2026-70454)\n * rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)\n * rsync: rsync \u003c 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)\n * rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)\n * rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)\n * rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)\n * rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)\n * rsync: rsync: Authorization bypass via `auth users` directive parsing (CVE-2026-70463)\n * rsync: rsync 3.1.0 \u003c 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)\n * rsync: rsync \u003c 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (CVE-2026-53791)\n * rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)\n * rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)\n * rsync: rsync \u003c 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)\n * rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)\n * rsync: rsync: Denial of Service via Zstandard compression thread exhaustion (CVE-2026-70455)\n * rsync: rsync: Memory corruption via out-of-bounds write in size parsing (CVE-2026-70457)\n * rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)\n * rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)\n * rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)\n * rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)\n\n\nBug Fix(es) and Enhancement(s): \n\n * Rebase rsync to version 3.5.0 in AlmaLinux10 (JIRA:AlmaLinux-246094)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
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"modified": "2026-09-15T08:42:07Z",
"published": "2026-09-14T00:00:00Z",
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}
CVE-2026-70452 (GCVE-0-2026-70452)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:46 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure
Summary
rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP access controls and gain unauthorized access to restricted module file trees.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:46 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-access… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
3.1.0 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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CVE-2026-70453 (GCVE-0-2026-70453)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:46 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync < 3.5.0 Algorithmic Complexity DoS via hash_search()
Summary
rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:30 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-algori… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
0 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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CVE-2026-70454 (GCVE-0-2026-70454)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:45 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync < 3.5.0 TLS Certificate Validation Bypass via SSL/OpenSSL Mode
Summary
rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate validation vulnerability that allows on-path attackers to intercept encrypted sessions by presenting self-signed or otherwise invalid certificates. Attackers can exploit the failure to validate server TLS certificates against a trusted CA or verify certificate hostname matching to decrypt or tamper with rsync session content without detection by the client.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:36 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-tls-ce… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
0 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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CVE-2026-70455 (GCVE-0-2026-70455)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:45 – Updated: 2026-08-14 19:45
VLAI
EPSS
VEX
Title
rsync 3.4.2 < 3.5.0 DoS via --zt Zstandard Compression Thread Exhaustion
Summary
rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt short alias for --compress-threads, which bypasses the refuse options directive's string matching on long option names. Attackers can specify --zt=N with a large value to spawn an unbounded number of Zstandard worker threads on the receiver, exhausting available thread and memory resources.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 18:30 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-dos-vi… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
3.4.2 , ≤ 3.4.4
(semver)
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2026-08-12 00:00
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CVE-2026-70456 (GCVE-0-2026-70456)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:44 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync 3.0.1 < 3.5.0 Heap Out-of-Bounds Write via read_args()
Summary
rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:47 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-heap-o… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
3.0.1 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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CVE-2026-70457 (GCVE-0-2026-70457)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:44 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync 3.2.3 < 3.5.0 Out-of-Bounds Write via parse_size_arg()
Summary
rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf truncates the formatted size string, the return value equals the number of characters that would have been written including the truncated portion, and this value may exceed the array length. The subsequent indexed write targets memory outside the intended array bounds, corrupting .bss memory.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:32 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-out-of… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
3.2.3 , ≤ 3.4.4
(semver)
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Date Public
2026-08-12 00:00
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CVE-2026-70458 (GCVE-0-2026-70458)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:44 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync 3.0.0 < 3.5.0 Out-of-Bounds Write via FLAG_HLINKED Handling
Summary
rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:36 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-out-of… | third-party-advisory |
Impacted products
1 product
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|---|---|---|---|
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Affected:
3.0.0 , ≤ 3.4.4
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CVE-2026-70460 (GCVE-0-2026-70460)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:43 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink
Summary
rsync 2.3.3 before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to escape the module root by exploiting symlinks within the module file tree when using --partial-dir or --backup-dir options. Attackers with write access to place a symlink under the module root, or who can exploit a pre-existing trusted symlink, can direct file writes to locations outside the intended module root, achieving arbitrary file write relative to the module root parent.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:49 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-path-t… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
2.3.3 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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CVE-2026-70461 (GCVE-0-2026-70461)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:42 – Updated: 2026-08-14 16:51
VLAI
EPSS
VEX
Title
rsync 3.2.5 < 3.5.0 Heap Out-of-Bounds Write via files-from Entry
Summary
rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsync daemon module by providing a files-from entry containing both an interior and trailing backslash, causing the add_implied_include() function to under-count the trailing backslash when sizing the destination buffer.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:36 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-heap-o… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
3.2.5 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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CVE-2026-70463 (GCVE-0-2026-70463)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:42 – Updated: 2026-08-14 18:09
VLAI
EPSS
VEX
Title
rsync 3.1.0 < 3.5.0 Authorization Bypass via auth users Directive Parsing
Summary
rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users parser uses comma-only tokenization when splitting the user list, which fails to correctly handle entries of the form @Group Name where the group name contains a space. The space within the group name causes the parser to split the entry at the space boundary, discarding the deny rule associated with the group. An authenticated user whose username or group membership would be denied by an @Group Name auth users entry can connect to a restricted module because the deny rule is silently discarded during parsing.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 18:03 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-author… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
3.1.0 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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