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TI-2025-30309 Aliases CVE-2025-47905GHSA-cvpp-rmjx-5x2m

Varnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14…

Priority LOW 25CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Varnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14, allow client-side desync via HTTP/1 requests, because the product incorrectly permits CRLF to be skipped to delimit chunk boundaries.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00367 30th percentileScored 2026-11-07
Fix Fixed Varnish Cache (varnish-software): 6.0.14 LTS, 7.6.3, 7.7.1Red Hat: 10 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
varnish-softwareVarnish Cachebefore 6.0.14 LTS; 7.0.0 to before 7.6.3; 7.7.0 to before 7.7.16.0.14 LTS, 7.6.3, 7.7.1Patch availableCNA
  • Varnish Cache Vendorvarnish-software Affected before 6.0.14 LTS; 7.0.0 to before 7.6.3; 7.7.0 to before 7.7.1 Fixed in 6.0.14 LTS, 7.6.3, 7.7.1 Patch available CNA

Remediation

  • Fix · CNA Varnish Cache (varnish-software) Fixed in 6.0.14 LTS, 7.6.3, 7.7.1

Red Hat 10 advisories

  • RHSA-2025:8550 Released 2025-06-04 · Red Hat rating Important
    varnish security update
    • Red Hat Enterprise Linux AppStream (v. 10) varnish-7.6.1-2.el10_0.1, varnish-docs-7.6.1-2.el10_0.1
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) varnish-devel-7.6.1-2.el10_0.1
  • RHSA-2025:8336 Released 2025-06-02 · Red Hat rating Important
    varnish:6 security update
    • Red Hat Enterprise Linux AppStream (v. 8) varnish-6.0.13-1.module+el8.10.0+23111+831cc069.1.aarch64::varnish:6, varnish-6.0.13-1.module+el8.10.0+23111+831cc069.1.ppc64le::varnish:6, varnish-6.0.13-1.module+el8.10.0+23111+831cc069.1.s390x::varnish:6 +15
  • RHSA-2025:8351 Released 2025-06-02 · Red Hat rating Important
    varnish security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) varnish-devel-6.6.2-3.el9_2.3
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) varnish-6.6.2-3.el9_2.3, varnish-docs-6.6.2-3.el9_2.3
Show 7 more Red Hat advisories
  • RHSA-2025:8349 Released 2025-06-02 · Red Hat rating Important
    varnish security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) varnish-devel-6.6.2-5.el9_4.1
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) varnish-6.6.2-5.el9_4.1, varnish-docs-6.6.2-5.el9_4.1
  • RHSA-2025:8350 Released 2025-06-02 · Red Hat rating Important
    varnish security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) varnish-6.6.2-2.el9_0.4, varnish-docs-6.6.2-2.el9_0.4
  • RHSA-2025:8337 Released 2025-06-02 · Red Hat rating Important
    varnish security update
    • Red Hat Enterprise Linux AppStream (v. 9) varnish-6.6.2-6.el9_6.1, varnish-docs-6.6.2-6.el9_6.1
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) varnish-devel-6.6.2-6.el9_6.1
  • RHSA-2025:8340 Released 2025-06-02 · Red Hat rating Important
    varnish:6 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) varnish-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.src::varnish:6, varnish-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.x86_64::varnish:6, varnish-devel-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.x86_64::varnish:6 +3
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) varnish-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.ppc64le::varnish:6, varnish-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.src::varnish:6, varnish-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.x86_64::varnish:6 +7
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) varnish-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.src::varnish:6, varnish-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.x86_64::varnish:6, varnish-devel-6.0.6-2.module+el8.4.0+23123+54dbaab7.6.x86_64::varnish:6 +3
  • RHSA-2025:8339 Released 2025-06-02 · Red Hat rating Important
    varnish:6 security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) varnish-6.0.6-1.module+el8.2.0+23124+897a7786.1.src::varnish:6, varnish-6.0.6-1.module+el8.2.0+23124+897a7786.1.x86_64::varnish:6, varnish-devel-6.0.6-1.module+el8.2.0+23124+897a7786.1.x86_64::varnish:6 +3
  • RHSA-2025:8310 Released 2025-05-29 · Red Hat rating Important
    varnish:6 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) varnish-6.0.8-2.module+el8.6.0+23122+0639db89.4.src::varnish:6, varnish-6.0.8-2.module+el8.6.0+23122+0639db89.4.x86_64::varnish:6, varnish-devel-6.0.8-2.module+el8.6.0+23122+0639db89.4.x86_64::varnish:6 +3
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) varnish-6.0.8-2.module+el8.6.0+23122+0639db89.4.aarch64::varnish:6, varnish-6.0.8-2.module+el8.6.0+23122+0639db89.4.ppc64le::varnish:6, varnish-6.0.8-2.module+el8.6.0+23122+0639db89.4.s390x::varnish:6 +15
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) varnish-6.0.8-2.module+el8.6.0+23122+0639db89.4.src::varnish:6, varnish-6.0.8-2.module+el8.6.0+23122+0639db89.4.x86_64::varnish:6, varnish-devel-6.0.8-2.module+el8.6.0+23122+0639db89.4.x86_64::varnish:6 +3
  • RHSA-2025:8294 Released 2025-05-29 · Red Hat rating Important
    varnish:6 security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) varnish-6.0.8-3.module+el8.8.0+23121+d8c7990e.3.aarch64::varnish:6, varnish-6.0.8-3.module+el8.8.0+23121+d8c7990e.3.ppc64le::varnish:6, varnish-6.0.8-3.module+el8.8.0+23121+d8c7990e.3.s390x::varnish:6 +15

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2025:8351
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2025:8349
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:8550
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:8336
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:8337
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:8339
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:8340
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:8310
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2025:8340
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:8310
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:8350
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2025:8294
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2025:8351
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:8349
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2025:8340
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:8310
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:8550
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:8337

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-47905
  2. 2026-10-03 Alias added: GHSA-cvpp-rmjx-5x2m

References

Other 1

  • TI-2025-07937 A mismatch caused by client-triggered server-sent stream resets between HTTP/2… CVSS 3.1HIGH 7.5
  • TI-2022-07931 In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10… CVSS 3.1CRITICAL 9.1
  • TI-2019-11944 An issue was discovered in Varnish Cache before 6.0.4 LTS, and 6.1.x and 6.2.x before… CVSS 3.0HIGH 7.5
  • TI-2026-26733 Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked… CVSS 3.1CRITICAL 9.8
  • TI-2022-22151 An HTTP Request Forgery issue was discovered in Varnish Cache 5.x and 6.x before 6.0.11… CVSS 3.1HIGH 7.5
  • TI-2020-09351 An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3… CVSS 3.1HIGH 7.5
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences