CVE-2026-119741
rsync < 3.5.2 Denial of Service via hash_search() Checksum Collisions
rsync before 3.5.2 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
rsync < 3.5.2 Denial of Service via hash_search() Checksum Collisions
rsync before 3.5.2 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
- Record
CVE-2026-119741- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-407
- Updated
- 2026-11-04
EUVDEUVD-2026-115914
rsync before 3.5.2 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
- Record
EUVD-2026-115914- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-04
GitHub AdvisoriesGHSA-56w4-j8c7-xvrw
rsync through 3.5.1 contains a denial of service vulnerability in the delta-transfer sender's...
rsync through 3.5.1 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
- Record
GHSA-56w4-j8c7-xvrw- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-407
- Updated
- 2026-11-03
NVD
rsync before 3.5.2 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
- Record
CVE-2026-119741- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-407
- Updated
- 2026-11-04
OSV
rsync < 3.5.2 Denial of Service via hash_search() Checksum Collisions
rsync before 3.5.2 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
- Record
CVE-2026-119741- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-407
- Updated
- 2026-11-05
OSVDEBIAN-CVE-2026-119741
rsync before 3.5.2 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
- Record
DEBIAN-CVE-2026-119741- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-05
OSVAZL-112646 No score
CVE-2026-119741 affecting package rsync 3.5.1-1
rsync through 3.5.1 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
- Record
AZL-112646- Updated
- 2026-11-04
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
rsyncAzure Linux:3 |
through 3.5.1-1 | None known |
rsyncDebian:12 |
All versions, plus listed versions 3.2.7-13.2.7-1+deb12u13.2.7-1+deb12u23.2.7-1+deb12u33.2.7-1+deb12u4 Show 29 moreShow less3.2.7-1+deb12u53.2.7-1+deb12u63.3.0+ds1-13.3.0+ds1-23.3.0+ds1-33.3.0+ds1-43.3.0-13.4.1+ds1-13.4.1+ds1-23.4.1+ds1-33.4.1+ds1-43.4.1+ds1-4~exp13.4.1+ds1-4~exp23.4.1+ds1-53.4.1+ds1-5~exp13.4.1+ds1-63.4.1+ds1-73.4.1+ds1-8~exp13.4.2+ds1-13.4.2+ds1-23.4.3+ds1-13.4.3+ds1-23.4.4+ds1-13.5.0+ds1-13.5.0+ds1-23.5.0+ds1-33.5.1+ds1-13.5.1+ds1-23.5.2+ds1-1 |
None known |
rsyncDebian:13 |
All versions, plus listed versions 3.4.1+ds1-53.4.1+ds1-5+deb13u13.4.1+ds1-5+deb13u23.4.1+ds1-5+deb13u33.4.1+ds1-5+deb13u4 Show 15 moreShow less3.4.1+ds1-63.4.1+ds1-73.4.1+ds1-8~exp13.4.2+ds1-13.4.2+ds1-23.4.3+ds1-13.4.3+ds1-23.4.4+ds1-13.5.0+ds1-0+deb13u13.5.0+ds1-13.5.0+ds1-23.5.0+ds1-33.5.1+ds1-13.5.1+ds1-23.5.2+ds1-1 |
None known |
rsyncDebian:14 |
All versions, plus listed versions 3.4.1+ds1-53.4.1+ds1-63.4.1+ds1-73.4.1+ds1-8~exp13.4.2+ds1-1 Show 10 moreShow less3.4.2+ds1-23.4.3+ds1-13.4.3+ds1-23.4.4+ds1-13.5.0+ds1-13.5.0+ds1-23.5.0+ds1-33.5.1+ds1-13.5.1+ds1-23.5.2+ds1-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| references | NVD | |
| description, references, title | CVE List | |
| affected, aliases, references | CVE List, EUVD, OSV | |
| affected, aliases, references | OSV | |
| references | OSV | |
| references | NVD | |
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references | CVE List, EUVD, GitHub Advisories, NVD | |
| cwes, facts, products, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-119741 is a high vulnerability (CVSS 8.7) in Rsyncproject Rsync, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. No source names a fixed version.
References
github.com/RsyncProject/rsync/releases/tag/v3.5.2
vulncheck.com/advisories/rsync-through-3.5.1-denial-of-service-via-hash-search-checksum-collisions
nvd.nist.gov/vuln/detail/CVE-2026-119741